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+*** START OF THE PROJECT GUTENBERG EBOOK 1282 ***
+
+TOM SWIFT AMONG THE DIAMOND MAKERS
+
+or The Secret of Phantom Mountain
+
+By Victor Appleton
+
+
+
+
+CONTENTS
+
+
+ CHAPTER
+
+ I A SUSPICIOUS JEWELER
+ II A MIDNIGHT VISIT
+ III A STRANGE STORY
+ IV ANDY FOGER GETS A FRIGHT
+ V A MYSTERIOUS MAN
+ VI MR. DAMON IS ON HAND
+ VII MR. PARKER PREDICTS
+ VIII OFF FOR THE WEST
+ IX A WARNING BY WIRELESS
+ X DROPPING THE STOWAWAY
+ XI A WEARY SEARCH
+ XII THE GREAT STONE HEAD
+ XIII ON PHANTOM MOUNTAIN
+ XIV WARNED BACK
+ XV THE LANDSLIDE
+ XVI THE VAST CAVERN
+ XVII THE PHANTOM CAPTURED
+ XVIII BILL RENSHAW WILL HELP
+ XIX IN THE SECRET CAVE
+ XX MAKING THE DIAMONDS
+ XXI FLASHING GEMS
+ XXII PRISONERS
+ XXIII BROKEN BONDS
+ XXIV IN GREAT PERIL
+ XXV THE MOUNTAIN SHATTERED--CONCLUSION
+
+
+
+
+CHAPTER I--A SUSPICIOUS JEWELER
+
+
+“Well, Tom Swift, I don't believe you will make any mistake if you buy
+that diamond,” said the jeweler to a young man who was inspecting a tray
+of pins, set with the sparkling stones. “It is of the first water, and
+without a flaw.”
+
+“It certainly seems so, Mr. Track. I don't know much about diamonds, and
+I'm depending on you. But this one looks to be all right.”
+
+“Is it for yourself, Tom?”
+
+“Er--no--that is, not exactly,” and Tom Swift, the young inventor of
+airships and submarines, blushed slightly.
+
+“Ah, I see. It's for your housekeeper, Mrs. Baggert. Well, I think she
+would like a pin of this sort. True, it's rather expensive, but--”
+
+“No, it isn't for Mrs. Baggert, Mr. Track,” and Tom seemed a bit
+embarrassed.
+
+“No? Well, then, Tom--of course it's none of my affair, except to
+sell you a good stone, But if this brooch is for a young lady, I can't
+recommend anything nicer. Do you think you will take this; or do you
+prefer to look at some others?”
+
+“Oh, I think this will do, Mr. Track. I guess I'll take--”
+
+Tom's words were interrupted by a sudden action on the part of the
+jeweler. Mr. Track ran from behind the showcase and hastened toward the
+front door.
+
+“Did you see him, Tom?” he cried. “I wonder which way he went?”
+
+“Who?” asked the lad, following the shopkeeper.
+
+“That man. He's been walking up and down in front of my place for the
+last ten minutes--ever since you've been in here, in fact, and I don't
+like his looks.”
+
+“What did he do?”
+
+“Nothing much, except to stare in here as if he was sizing my place up.”
+
+“Sizing it up?”
+
+“Yes. Getting the lay of the land, so he or some confederate could
+commit a robbery, maybe.”
+
+“A robbery? Do you think that man was a thief?”
+
+“I don't know that he was, Tom, and yet a jeweler has to be always
+on the watch, and that isn't a joke, either, Tom Swift. Swindlers and
+thieves are always on the alert for a chance to rob a jewelry store, and
+they work many games.”
+
+“I didn't notice any particular man looking in here,” said Tom, who
+still held the diamond brooch in his hand.
+
+“Well I did,” went on the jeweler. “I happened to glance out of the
+window when you were looking at the pins, and I saw his eyes staring in
+here in a suspicious manner. He may have a confederate with him, and,
+when you're gone, one may come in, and pretend to want to look at some
+diamonds. Then, when I'm showing him some, the other man will enter,
+engage my attention, and the first man will slip out with a diamond ring
+or pin. It's often done.”
+
+“You seem to have it all worked out, Mr. Track,” observed the lad, with
+a smile. “How do you know but what I'm in with a gang of thieves, and
+that I'm only pretending to want to buy a diamond pin?”
+
+“Oh, I guess I haven't known you, Tom Swift, ever since you were
+big enough to toddle, not to be sure about what you're up to. But I
+certainly didn't like the looks of that man. However, let's forget about
+him. He seems to have gone down the street, and, after all, perhaps I
+was mistaken. Just wait until I show you a few more styles before you
+decide. The young lady may like one of these,” and the jeweler went to
+another showcase and took out some more trays of brooches.
+
+“What makes you think she's a young lady, Mr. Track?” asked the lad.
+
+“Oh, it's easy guessing, Tom. We jewelers are good readers of character.
+I can size up a young fellow coming in here to buy an engagement or a
+wedding ring, as soon as he enters the door. I suppose you'll soon be
+in the market for one of those, Tom, if all the reports I hear about you
+are true--you and a certain Mary Nestor.”
+
+“I--er--I think I don't care for any of these pins,” spoke Tom, quickly,
+with a blush. “I like the first lot best. I think I'll take the one I
+had in my hand when that man alarmed you. Ha! That's odd! What did I do
+with it?”
+
+Tom looked about on the showcase, and glanced down on the floor. He had
+mislaid the brooch, but the jeweler, with a laugh, lifted it out of a
+tray a moment later.
+
+“I saw you lay it down,” he said. “We jewelers have to be on the watch.
+Here it is. I'll just put it in a box, and--”
+
+With an exclamation, Mr. Track gave a hasty glance toward his big show
+window. Tom looked up, and saw a man's face peering in. At the sight of
+it, he, too, uttered a cry of surprise.
+
+The next instant the man outside knocked on the glass, apparently with
+a piece of metal, making a sharp sound. As soon as he heard it, the
+jeweler once more sprang from behind the showcase, and leaped for the
+door crying:
+
+“There's the thief! He's trying to cut a hole through my show window and
+reach in and get something! It's an old trick. I'll get the police! Tom,
+you stay here on guard!” and before the lad could utter a protest, the
+jeweler had opened the door, and was speeding down the street in the
+gathering darkness.
+
+Tom stared about him in some bewilderment. He was left alone in charge
+of a very valuable stock of jewelry, the owner of which was racing after
+a supposed thief, crying:
+
+“Police! Help! Thieves! Stop him, somebody!”
+
+“This is a queer go,” mused Tom. “I wonder who that man was? He looked
+like somebody I know, and yet I can't seem to place his face. I
+wonder if he was trying to rob the place? Maybe there's another one--a
+confederate--around here.”
+
+This thought rather alarmed Tom, so he went to the door, and looked up
+and down the street. He could see no suspicious characters, but in the
+direction in which the jeweler was running there was a little throng of
+people, following Mr. Track after the man who had knocked on the window.
+
+“I wish I was there, instead of here,” mused the lad. “Still I can't
+leave, or a thief might come in. Perhaps that was the game, and one of
+the gang is hanging around, hoping the store will be deserted, so he can
+enter and take what he likes.”
+
+Tom had read of such cases, and he at once resolved that he would not
+only remain in the jewelry shop, but that he would lock the door, which
+he at once proceeded to do. Then he breathed easier.
+
+The town of Shopton, in the outskirts of which Tom lived with his
+father, and where the scene above narrated took place, was none too well
+lighted at night, and the lad had his doubts about the jeweler catching
+the oddly-acting man, especially as the latter had a good start.
+
+“But some one may head him off,” reasoned Tom. “Though if they do catch
+him, I don't see what they can prove against him. Hello, here I am
+carrying this diamond pin around. I might lose it. Guess I'll put it
+back on the tray.”
+
+He replaced in the proper receptacle one of the pins he had been
+examining when the excitement occurred.
+
+“I wonder if Mary will like that?” he said, softly. “I hope she does.
+Perhaps it would be better if she could come here herself and pick out
+one--”
+
+Tom's musing was suddenly interrupted by a sharp tattoo on the glass
+door of the jewelry shop. With a start, he looked up, to see staring in
+on him the face of the man who had been there before--the man of whom
+the jeweler was even then in chase.
+
+“Why--why----” stammered Tom.
+
+The man knocked again.
+
+“Tom--Tom Swift!” he called. “Don't you know me?”
+
+“Know you--you?” repeated the lad.
+
+“Yes--don't you remember Earthquake Island--how we were nearly killed
+there--don't you remember Mr. Jenks?”
+
+“Mr. Jenks?”
+
+Tom was so startled that he could only repeat words after the strange
+man, who was talking to him from outside the glass door.
+
+“Yes, Mr. Jenks,” was the reply. “Mr. Barcoe Jenks, who makes diamonds.
+I saw you in the store about to buy a diamond--I wanted to tell you not
+to--I'll give you a better diamond than you can buy--I just arrived in
+this place--I must have a private talk with you--Come out--I'll share a
+wonderful secret with you.”
+
+A flood of memory came to Tom. He did recall the very strange man who
+walked around Earthquake Island--where Tom and some friends had been
+marooned recently--walked about with a pocketful of what he said were
+diamonds. Now Barcoe Jenks was here.
+
+“I must see you privately, Tom Swift,” went on Mr. Jenks, as he once
+more tapped on the glass. “Don't waste money buying diamonds, when you
+and I can make better ones. Where can I have a talk with you? I--” Mr.
+Jenks suddenly looked down the dimly-lighted street. “They're coming
+back!” he cried. “I don't want to be seen. I'll call at your house later
+to-night--be on the watch for me--until then--good-by!”
+
+He waved his hand, and was gone in an instant. Tom stood staring at the
+glass door. He hardly knew whether to believe it or not--perhaps it was
+all a dream.
+
+He pinched himself to make sure that he was awake. Very substantial
+flesh met his thumb and finger, and he felt the pain.
+
+“I'm awake all right,” he murmured. “But Barcoe Jenks here--and still
+talking that nonsense about his manufactured diamonds. I think he must
+be crazy. I wonder--”
+
+Once more the lad's musing was interrupted. He heard a murmur of excited
+voices outside the store, on the street. Then the door of the jewelry
+shop was tried. Mr. Track's face was pressed against the glass.
+
+“Open the door! Let me in, Tom!” he called. “I've caught the thief,” and
+as the lad unlocked the portal he saw that the jeweler held by the arm
+a ragged lad. “Ah; you scoundrel! I've caught you!” cried the diamond
+merchant, shaking the small chap, while Tom looked on, more mystified
+than ever.
+
+
+
+
+CHAPTER II--A MIDNIGHT VISIT
+
+
+While Mr. Track, the jeweler, and several citizens, attracted by the
+chase after the supposed thief, are crowded into the store, anxious to
+hear explanations of the strange affair, I will take the opportunity to
+tell you something of Tom Swift, the lad who is to figure in this story.
+
+Many of you have already made his acquaintance, when he has been
+speeding about in his airship or fast electric runabout, and to others
+we will state that our hero first made his bow to the public in the
+book called “Tom Swift and His Motor-Cycle,” the initial volume of this
+series.
+
+In that story there was related how Tom made the acquaintance of an
+odd individual, named Mr. Wakefield Damon, who was continually blessing
+himself, some part of his anatomy, or his possessions. Mr. Damon was
+riding a motor-cycle, and it started to climb a tree, to his pain and
+fright. Afterward Tom purchased the machine, and had many adventures
+on it, including a chase after a gang of men who had stolen a valuable
+patent model belonging to Mr. Swift.
+
+Mr. Swift and his son were both inventors. They lived together in a
+fine house in the suburbs of Shopton, New York, and with them dwelt Mrs.
+Baggert, the housekeeper (for Tom's mother was dead), and also Garret
+Jackson, an expert engineer, who aided the young inventor and his father
+in perfecting many machines.
+
+There was also another semi-member of the household, to wit, Eradicate
+Sampson, an eccentric colored man, who owned a mule called Boomerang.
+Eradicate did odd jobs around the place, and the mule assisted his
+owner--that is when the mule felt like it.
+
+In the second volume of the series, entitled “Tom Swift and His
+Motor-Boat,” there was related the incidents following a pursuit after
+a gang of unprincipled men, who sought to get possession of some of Mr.
+Swift's patents, and it was while in this boat that Tom, his father, and
+a friend, Ned Newton, rescued from Lake Carlopa a Mr. John Sharp, who
+fell from his burning balloon. Mr. Sharp was a skilled aeronaut, and
+after his recovery he joined Tom in building a big airship, called the
+Red Cloud. Tom's adventures in this craft are set down in detail in the
+third volume of the series, called “Tom Swift and His Airship.” Not only
+did he and Mr. Sharp and Mr. Damon make a great trip, but they captured
+some bank robbers, and incidentally cleared themselves from the
+imputation of having looted the vault of seventy-five thousand dollars,
+which charge was fostered by a certain Mr. Foger, and his son Andy, who
+was Tom's enemy.
+
+Not satisfied with having conquered the air, Tom and his father set
+to work to gain a victory over the ocean. They built a boat that could
+navigate under water, and, in the fourth book of the series, called “Tom
+Swift and His Submarine Boat,” you will find an account of how they went
+under the ocean to secure a sunken treasure, and the fight they had with
+their enemies who sought to get it away from them. They went through
+many perils, not the least of which was capture by a foreign warship.
+
+In the fifth book, entitled “Tom Swift and His Electric Runabout,” there
+was told the story of a wonderfully speedy electric automobile the young
+inventor constructed, and how he made a great race in it, and saved from
+ruin a bank, in which his father and Mr. Damon were interested.
+
+Tom's ability as an inventor had, by this time, become well known. One
+day, as related in a volume called “Tom Swift and His Wireless Message,”
+ he received a letter from a Mr. Hosmer Fenwick, of Philadelphia, asking
+his aid in perfecting an airship which the resident of the Quaker
+City had built, but which would not work. In his small monoplane, the
+Butterfly, Tom and Mr. Damon went to Philadelphia, as Mr. Damon was
+acquainted with Mr. Fenwick.
+
+Tom carefully inspected the Whizzer which was the name of Mr. Fenwick's
+airship, and, after some difficulties, succeeded in getting the electric
+craft in shape to make a flight.
+
+Tom, Mr. Damon and Mr. Fenwick started to make a trip to Cape May in the
+Whizzer, but were caught in a terrific storm, and blown out to sea.
+The wind became a hurricane, the airship was disabled, and wrecked in
+mid-air. When it fell to earth it landed on one of the small West Indian
+islands, but what was the terror of the three castaways to find that the
+island was subject to earthquake shocks.
+
+But the earth-tremors were not the only surprise in store for Tom and
+his two friends, On the island they found five men and two ladies, who,
+by strange chance, had been stranded there when the yacht Resolute,
+owned by Mr. George Hosbrook, was wrecked in the same storm that
+disabled the airship. Mr. Hosbrook, a millionaire, was taking a party of
+friends to the West Indies.
+
+When the castaways (among whom were Mr. and Mrs. Amos Nestor, parents
+of Mary Nestor, a girl of whom Tom was very fond) found that there was
+danger of the island being destroyed in an earthquake, they were in
+despair. There seemed no way of being rescued, as the island was out of
+the line of regular ship travel.
+
+Tom, however, was resourceful. With the electrical apparatus from the
+wrecked airship, he built a wireless plant, and sent messages for help,
+broadcast over the ocean.
+
+They were finally heard, and answered, by an operator on board the
+steamer Camberanian, which came on under forced draught, and rescued
+Tom and his friends. It was only just in time, for, no sooner had
+they gotten aboard the steamer in lifeboats, than the whole island was
+destroyed by an earthquake shock.
+
+But Tom, the parents of Mary Nestor, Mr. Damon, Mr. Fenwick, and all the
+others, got safely home. Among the survivors from the yacht Resolute
+was a Mr. Barcoe Jenks, who now, most unexpectedly, had confronted Tom
+through the glass window of the jewelry store. Mr. Jenks was a peculiar
+man. Tom discovered this on Earthquake Island. Mr. Jenks carried with
+him some stones which he said were diamonds. He asserted that he had
+made them, but Tom did not know whether or not to believe this.
+
+When it seemed that the castaways would not be saved Mr. Jenks offered
+Tom a large sum in these same diamonds for some plan whereby he might
+escape the earthquakes. Mr. Jenks said there was a certain secret in
+connection with the manufactured diamonds that he had to solve--that he
+had been defrauded of his rights--and that a certain Phantom Mountain
+figured in it. But Tom, at that time, paid little attention to Mr.
+Jenks' talk. The time was to come, however, when he would attach much
+importance to it.
+
+When this story opens, Tom was more interested in Mr. Barcoe Jenks than
+in any one else, and was wondering what he wanted to see him about. The
+young inventor could not quite understand how Mr. Track, the jeweler,
+could come back with a lad he suspected of being a thief, when the
+person who had acted so suspiciously, and who had knocked on the glass,
+was the queer man, Mr. Jenks.
+
+“Yes, Tom I caught him,” the jeweler went on. “I chased after him, and
+nabbed him. It was hard work, too, for I'm not a good runner. Now, you
+little rascal, tell me why you tried to rob my store?” and the diamond
+merchant shook the lad roughly.
+
+“I--I didn't try to rob your store,” was the timid answer.
+
+“Well, perhaps you didn't, exactly, but your confederates did. Why did
+you rap on the glass, and why were you staring in so intently?”
+
+“I wasn't lookin' in.”
+
+“Well, if it wasn't you, it was some one just like you. But why did you
+run when I raced down the street?”
+
+“I--I don't know,” and the lad began to snivel. “I--I jest ran--that's
+all--'cause I see everybody else runnin', an' I thought there was a
+fire.”
+
+“Ha! That's a likely story! You ran because you are guilty! I'm going to
+hand you over to the police.”
+
+“Did he get anything, Mr. Track?” asked one of the men who had joined
+the jeweler in the chase.
+
+“No, I can't say that he did. He didn't get a chance. Tom Swift was
+in here at the time. But this fellow was only waiting for a chance to
+steal, or else to aid his confederates.”
+
+“But, if he didn't take anything, I don't see how you can have him
+arrested,” went on the man.
+
+“On suspicion; that's how!” asserted Mr. Track. “Will some one get me a
+constable?”
+
+“I wouldn't call a constable,” said Tom, quietly.
+
+“Why not?”
+
+“Because that isn't the person who looked in your window.”
+
+“How do you know, Tom?”
+
+“Because that person came back while you were out. I saw him.”
+
+“You saw him? Did he try to steal any of my diamonds, Tom?”
+
+“No, I guess he doesn't need any.”
+
+“Why not?” There was wonder in the jeweler's tone.
+
+“Why, he claims he can make all he wants.”
+
+“Make diamonds?”
+
+“So he says.”
+
+“Why, he must be crazy!” and Mr. Track laughed.
+
+“Perhaps he is,” admitted Tom, “I'm only telling you what he says. He's
+the person who acted so suspiciously. He came back here, I'm telling
+you, while you were running down the street, and spoke to me.”
+
+“Oh, then you know him?” The jeweler's voice was suspicious.
+
+“I didn't at first,” admitted Tom. “But when he said he was Mr.
+Barcoe Jenks, I remembered that I had met him when I was cast away on
+Earthquake Island.”
+
+“And he says he can make diamonds?” asked Mr. Track.
+
+“What did he want of you?” and the jeweler looked at Tom, quizzically.
+
+“He wanted to have a talk with me,” replied the lad, “and when he saw
+me in your store, he tried to attract my attention by knocking on the
+glass.”
+
+“That's a queer way to do,” declared Mr. Track. “What did he want?”
+
+“I don't know exactly,” answered Tom, not caring to go into details just
+then. “But I'm sure, Mr. Track, that you've got the wrong person there.
+That lad never looked in the window, nor knocked on the glass.”
+
+“That's right--I didn't,” asserted the captive.
+
+The jeweler looked doubtful.
+
+“Why did you run?” he asked.
+
+“I told you, I thought there was a fire.”
+
+“That's right, I don't believe he's the fellow you want,” put in another
+man. “I was standing on the corner, near White's grocery store, and
+I noticed this lad. That was before I heard you yelling, and saw you
+coming, and then I joined in the chase. I guess the man you were after
+got away, Track.”
+
+“He did,” asserted Tom. “He came back here, a little while ago, and he
+ran away just now, as he heard you coming.”
+
+“Where did he go?” asked the jeweler, eagerly.
+
+“I don't know,” answered Tom. “Only you've got the wrong lad here.”
+
+“Well, perhaps I have,” admitted the diamond merchant. “You can go,
+youngster, but next time, don't run if you're not guilty.”
+
+“I thought there was a fire,” repeated the lad, as he hurriedly slipped
+through the crowd in the store, and disappeared down the dark street.
+
+“Well, I guess the excitement's all over, and, anyhow, you weren't
+robbed, Track,” said a stout man, as he left the store. The others soon
+followed, and Tom and the jeweler were once more alone in the shop.
+
+“Can you tell me something about this man, Tom?” asked Mr. Track,
+eagerly. “So he really makes diamonds. Who is he?”
+
+“I'd rather not tell--just now,” replied the young inventor. “I don't
+take much stock in him, myself. I think he's visionary. He may think he
+has made diamonds, and he may have made some stones that look like them.
+I'm very skeptical.”
+
+“If you could bring me some, Tom, I could soon tell whether they were
+real or not. Can you?”
+
+The lad shook his head.
+
+“I don't expect to see Mr. Jenks again,” he said. “He talked
+rather wildly about waiting to meet me, but that man is odd--crazy,
+perhaps--and I don't imagine I'll see him. He's harmless, but he's
+eccentric. Well, there was quite some excitement for a time.”
+
+“I should say there was. I thought it was a plan to rob me,” and the
+jeweler began putting away the diamond pins. In fact, the excitement
+so filled the minds of himself and Tom that neither of them thought any
+more of the object of the lad's visit, and the young inventor departed
+without purchasing the pin he had come after.
+
+It was not until he was out on the street, walking toward his home, that
+the matter came back to his mind.
+
+“I declare!” he exclaimed. “I didn't get that pin for Mary, after all!
+Well, never mind, I have a week until her birthday, and I can get it
+to-morrow.”
+
+He walked rapidly toward home, for the weather looked threatening, and
+Tom had no umbrella. He was musing on the happenings of the evening when
+he reached his house. His father was out, as was Garret Jackson, the
+engineer; and Mrs. Baggert, the housekeeper, was entertaining a lady in
+the sitting-room, so, as Tom was rather tired, he went directly to his
+own room, and, a little later got into bed.
+
+It was shortly after midnight when he was awakened by hearing a rattling
+on the window of his room. The reason he was able to fix the time
+so accurately was because as soon as he awakened he pressed a little
+electric button, and it illuminated the face of a small clock on his
+bureau. The hands pointed to five minutes past twelve.
+
+“Humph! That sounds like hail!” exclaimed Tom, as he arose, and looked
+out of the casement. “I wonder if any of the skylights of the airship
+shed are open? There might be some damage. Guess I'd better go out and
+take a look.”
+
+He had mentally reasoned this far before he had looked out, and when
+he saw that the moon was brightly shining in a clear sky, he was a bit
+surprised.
+
+“Why--that wasn't hail,” he murmured. “It isn't even raining. I wonder
+what it was?”
+
+He was answered a moment later, for a shower of fine gravel from the
+walk flew up and clattered against the glass. With a start, Tom looked
+down, and saw a dark figure standing under an apple tree.
+
+“Hello! Who's there?” called the lad, after he had raised the sash.
+
+“It's I--Mr. Jenks,” was the surprising answer.
+
+“Mr. Jenks?” repeated Tom.
+
+“Yes--Barcoe Jenks, of Earthquake Island.”
+
+“You here? What do you want?”
+
+“Can you come down?”
+
+“What for?”
+
+“Tom Swift, I've something very important to tell you,” was the answer
+in a low voice, yet which carried to Tom's ears perfectly. “Do you want
+to make a fortune for yourself--and for me?”
+
+“How?” Tom was beginning to think more and more that Mr. Jenks was
+crazy.
+
+“How? By helping me to discover the secret of Phantom Mountain, where
+the diamonds are made! Will you?”
+
+“Wait a minute--I'll come down,” answered Tom, and he began to grope for
+his clothes in the dim light of the little electric lamp.
+
+What was the secret of Phantom Mountain? What did Mr. Jenks really want?
+Could he make diamonds? Tom asked himself these questions as he hastily
+dressed to go down to his midnight visitor.
+
+
+
+
+CHAPTER III--A STRANGE STORY
+
+
+“Well, Mr. Jenks,” began Tom, when he had descended to the garden, and
+greeted the man who had acted so strangely on Earthquake Island, “this
+is rather an odd time for a visit.”
+
+“I realize that, Tom Swift,” was the answer, and the lad noticed that
+the man spoke much more calmly than he had that evening at the jewelry
+shop. “I realize that, but I have to be cautious in my movements.”
+
+“Why?”
+
+“Because there are enemies on my track. If they thought I was seeking
+aid to discover the secret of Phantom Mountain, my life might pay the
+forfeit.”
+
+“Are you in earnest, Mr. Jenks?”
+
+“I certainly am, and, while I must apologize for awakening you at this
+unseemly hour, and for the mysterious nature of my visit, if you will
+let me tell my story, you will see the need of secrecy.”
+
+“Oh, I don't mind being awakened,” answered Tom, good-naturedly, “but
+I will be frank with you, Mr. Jenks. I hardly can believe what you have
+stated to me several times--that you know how diamonds can be made.”
+
+“I can prove it to you,” was the quiet answer.
+
+“Yes, I know. For centuries men have tried to discover the secret of
+transmuting base metals into gold, and how to make diamonds by chemical
+means. But they have all been failures.”
+
+“All except this process--the process used at Phantom Mountain,”
+ insisted the queer man. “Do you want to hear my story?”
+
+“I have no objections.”
+
+“Then let me warn you,” went on Mr. Jenks, “that if you do hear it, you
+will be so fascinated by it that I am sure you will want to cast your
+lot in with mine, and aid me to get my rights, and solve the mystery.
+And I also want to warn you that if you do, there is a certain amount of
+danger connected with it.”
+
+“I'm used to danger,” answered Tom, quietly. “Let me hear your story.
+But first explain how you came to come here, and why you acted so
+strangely at the jewelry store.”
+
+“Willingly. I tried to attract your attention at the store, because I
+saw that you were going to buy a diamond, and I didn't want you to.”
+
+“Why not?”
+
+“Because I want to present you with a beautiful stone, that will answer
+your purpose as well or better, than any one you could buy. That will
+prove my story better than any amount of words or argument. But I could
+not attract your attention without also attracting that of the jeweler.
+He became suspicious, gave chase, and I thought it best to vanish. I
+hope no one was made to suffer for what may have been my imprudence.”
+
+“No, the lad whom Mr. Track caught was let go. But how did you happen to
+come to Shopton?”
+
+“To see you. I got your address from the owner of the yacht Resolute. I
+knew that if there was one person who could aid me to recover my rights,
+it would be you, Tom Swift. Will you help me? Will you come with me to
+discover the secret of Phantom Mountain? If we go, it will have to be in
+an airship, for in no other way, I think, can we come upon the place, as
+it is closely guarded. Will you come? I will pay you well.”
+
+“Perhaps I had better hear your story,” said the young inventor. “But
+first let me suggest that we move farther away from the house. My
+father, or Mr. Jackson, or the housekeeper, may hear us talking, and it
+may disturb them. Come with me to my private shop,” and Tom led the way
+to a small building where he did experimental work. He unlocked the door
+with a key he carried, turned on the lights, which were run by a storage
+battery, and motioned Mr. Jenks to a seat.
+
+“Now I'll hear your story,” said Tom.
+
+“I'll make it as short as possible,” went on the queer man. “To begin
+with, it is now several years ago since a poorly dressed stranger
+applied to me one night for money enough to get a meal and a bed to
+sleep in. I was living in New York City at the time, and this was
+midnight, as I was returning home from my club.
+
+“I was touched by the man's appearance, and gave him some money. He
+asked for my card, saying he would repay me some day. I gave it to him,
+little thinking I would hear from the man again. But I did. He called
+at my apartments about a week later, saying he had secured work as an
+expert setter of diamonds, and wanted to repay me. I did not want to
+take his money, but the fact that such a sorry looking specimen of
+manhood as he had been when I aided him, was an expert handler of gems
+interested me. I talked with the man, and he made a curious statement.
+
+“This man, who gave his name as Enos Folwell, said he knew a place where
+diamonds could be made, partly in a scientific manner, and partly by the
+forces of nature. I laughed at him, but he told me so many details that
+I began to believe him. He said he and some other friends of his, who
+were diamond cutters, had a plant in the midst of the Rocky Mountains,
+where they had succeeded in making several small, but very perfect
+diamonds. They had come to the end of their rope, though, so to speak,
+because they could not afford to buy the materials needed. Folwell
+said that he and his companions had temporarily separated, had left the
+mountain where they made diamonds, and agreed to meet there later when
+they had more money with which to purchase materials. They had all
+agreed to go out into civilization, and work for enough funds to enable
+them to go on with their diamond making.
+
+“I hardly knew whether to believe the man or not, but he offered proof.
+He had several small, but very perfect diamonds with him, and he gave
+them to me, to have tested in any way I desired.
+
+“I promised to look into the matter, and, as I was quite wealthy, as,
+in fact I am now, and if I found that the stones he gave me were real, I
+said I might invest some money in the plant.”
+
+“Were the diamonds good?” asked Tom, who was beginning to be interested.
+
+“They were--stones of the first water, though small. An expert gem
+merchant, to whom I took them, said he had never seen any diamonds like
+them, and he wanted to know where I got them. Of course I did not tell
+him.
+
+“To make a long story short, I saw Folwell again, told him to
+communicate with his companions, and to tell them that I would agree to
+supply the cash needed, if I could share in the diamond making. To this
+they agreed, and, after some weeks spent in preparation, a party of us
+set out for Phantom Mountain.”
+
+“Phantom Mountain?” interrupted Tom. “Where is it?”
+
+“I don't know, exactly--it's somewhere in the Rockies, but the exact
+location is a mystery. That is why I need your help. You will soon
+understand the reason. Well, as I said, myself, Folwell and the others,
+who were not exactly prepossessing sort of men, started west. When we
+got to a small town, called Indian Ridge, near Leadville, Colorado,
+the men insisted that I must now proceed in secret, and consent to be
+blindfolded, as they were not yet ready to reveal the secret of the
+place where they made the diamonds.
+
+“I did not want to agree to this, but they insisted, and I gave in,
+foolishly perhaps. At any rate I was blindfolded one night, placed in
+a wagon, and we drove off into the mountains. After traveling for some
+distance I was led, still blindfolded, up a steep trail.
+
+“When the bandage was taken off my eyes I saw that I was in a large
+cave. The men were with me, and they apologized for the necessity that
+caused them to blindfold me. They said they were ready to proceed with
+the making of diamonds, but I must promise not to seek to discover the
+secret until they gave me permission, nor was I to attempt to leave the
+cave. I had to agree.
+
+“Next they demanded that I give them a large sum, which I had promised
+when they showed me, conclusively, that they could make diamonds. I
+refused to do this until I had seen some of the precious stones, and
+they agreed that this was fair, but said I would have to wait a few
+days.
+
+“Well, I waited, and, all that while, I was virtually a prisoner in the
+cave. All I could learn was that it was in the midst of a great range,
+near the top, and that one of the peaks was called Phantom Mountain.
+Why, I did not learn until later.
+
+“At last one night, during a terrific thunder storm, the leader of the
+diamond makers--Folwell--announced that I could now see the stones made.
+The men had been preparing their chemicals for some days previous. I
+was taken into a small chamber of the cave, and there saw quite a
+complicated apparatus. Part of it was a great steel box, with a lever on
+it.
+
+“We will let you make some diamonds for yourself,” Folwell said to me,
+and he directed me to pull the lever of the box, at a certain signal.
+The signal came, just as a terrific crash of thunder shook the very
+mountain inside of which we were. The box of steel got red-hot, and when
+it cooled off it was opened, and was given a handful of white stones.
+
+“Were they diamonds?” asked Tom, eagerly.
+
+Mr. Jenks held out one hand. In the palm glittered a large
+stone--ostensibly a diamond. In the rays of the moon it showed all the
+colors of the rainbow--a beautiful gem. “That is one of the stones I
+made--or rather that I supposed I had made,” went on Mr. Jenks. “It is
+one of several I have, but they have not all been cut and polished as
+has this one.
+
+“Naturally I was much impressed by what I saw, and, after I had made
+certain tests which convinced me that the stones in the steel box were
+diamonds, I paid over the money as I had promised. That was my undoing.”
+
+“How?”
+
+“As soon as the men got the cash, they had no further use for me. The
+next I remember is eating a rude meal, while we discussed the future of
+making diamonds. I knew nothing more until I found myself back in the
+small hotel at Indian Ridge, whence I had gone some time previous, with
+the men, to the cave in the mountain.”
+
+“What happened?” asked Tom, much surprised by the unexpected outcome of
+the affair.
+
+“I had been tricked, that was all! As soon as the men had my
+money they had no further use for me. They did not want me to learn the
+secret of their diamond making, and they drugged me, carried me away
+from the cave, and left me in the hotel.”
+
+“Didn't you try to find the cave again?”
+
+“I did, but without avail. I spent some time in the Rockies, but no one
+could tell where Phantom Mountain was; in fact, few had heard of it, and
+I was nearly lost searching for it.
+
+“I came back East, determined to get even. I had given the men a
+very large sum of money, and, in exchange, they had given me several
+diamonds. Probably the stones are worth nearly as much as the money I
+invested, but I was cheated, for I was promised an equal share in the
+profits. These were denied me, and I was tricked. I determined to be
+revenged, or at least to discover the secret of making diamonds. It is
+my right.”
+
+“I agree with you,” spoke Tom.
+
+“But, up to the time I met you on Earthquake Island, I could form no
+plan for discovering Phantom Mountain, and learning the secret of the
+diamond makers,” went on Mr. Jenks. “I carried the gems about with me,
+as you doubtless saw when we were on the island. But I knew I needed an
+airship in which to fly over the mountains, and pick out the location of
+the cave where the diamonds are made.”
+
+“But how can you locate it, if you were blindfolded when you were taken
+there, Mr. Jenks?”
+
+“I forgot to tell you that, on our journey into the mountains, and just
+before I was carried into the cave, I managed to raise one corner of
+the bandage. I caught a glimpse of a very peculiarly shaped cliff--it
+is like a great head, standing out in bold relief against the moonlight,
+when I saw it. That head of rock is near the cave. It may be the
+landmark by which we can locate Phantom Mountain.”
+
+“Perhaps,” admitted the young inventor.
+
+“What I want to know is this,” went on Mr. Jenks. “Will you go with me
+on this quest--go in your airship to discover the secret of the diamond
+makers? If you will, I will share with you whatever diamonds we can
+discover, or make; besides paying all expenses. Will you go, Tom Swift?”
+
+The young inventor did not know what to answer. How far was Mr. Jenks
+to be trusted? Were the stones he had real diamonds? Was his story,
+fantastical as it sounded--true? Would it be safe for Tom to go?
+
+The lad asked himself these questions. Mr. Jenks saw his hesitation.
+
+“Here,” said the strange man, “I will prove what I say. Take this
+diamond. I intended it for you, anyhow, for what you did for me on
+Earthquake Island. Take it, and--and give it to the person for whom you
+were about to purchase a diamond to-night. But, first of all, take it to
+a gem expert, and get his opinion. That will prove the truth of what
+I say, Tom Swift, and I feel sure that you will cast your lot in with
+mine, and help me to discover the secret of Phantom Mountain, and aid me
+to get my rights from the diamond makers!”
+
+
+
+
+CHAPTER IV--ANDY FOGER GETS A FRIGHT
+
+
+Tom Swift considered a few minutes. On the face of it, the proposition
+appealed to him. He had been home some time now after his adventures on
+Earthquake Island, and he was beginning to long for more excitement. The
+search for the mysterious mountain, and the cave of the diamond makers,
+might offer a new field for him. But there came to him a certain
+distrust of Mr. Jenks.
+
+“I don't like to doubt your word,” began Tom, slowly, “but you know,
+Mr. Jenks, that some of the greatest chemists have tried in vain to make
+diamonds; or, at best, they have made only tiny ones. To think that any
+man, or set of men, made real diamonds as large as the ones you have,
+doesn't seem--well--” and Tom hesitated.
+
+“You mean you can hardly believe me?” asked Mr. Jenks.
+
+“I guess that's it,” assented Tom.
+
+“I don't blame you a bit!” exclaimed the odd man. “In fact, I didn't
+believe it when they told me they could make diamonds. But they proved
+it to me. I'm ready now to prove it to you.”
+
+“I'll tell you what I'll do. Here's this one stone, cut ready for
+setting. Here's another, uncut,” and Mr. Jenks drew from his pocket
+what looked like a piece of crystal. “Take them to any jeweler,” he
+resumed--“to the one in whose place I saw you to-night. I'll abide by
+the verdict you get, and I'll come here to-morrow night, and hear what
+you have to say.”
+
+“Why do you come at night?” asked Tom, thinking there was something
+suspicious in that.
+
+“Because my life might be in danger if I was seen talking to you, and
+showing you diamonds in the daytime--especially just now.
+
+“Why at this particular time?”
+
+“For the reason that the diamond makers are on my trail. As long as I
+remained quiet, after their shabby treatment of me, and did not try to
+discover their secret, they were all right. But, after I realized that
+I had been cheated out of my rights, and when I began to make an
+investigation, with a view to discovering their secret whereabouts, I
+received mysterious and anonymous warnings to stop.”
+
+“But I did not. I came East, and tried to get help to discover the cave
+of the diamond makers, but I was unsuccessful. I needed an airship, as
+I said, and no person who could operate one, would agree to go with
+me on the quest. Again I received a warning to drop all search for the
+diamond makers, but I persisted, and about a week ago I found I was
+being shadowed.”
+
+“Shadowed; by whom?” asked Tom.
+
+“By a man I never remember seeing, but who, I have no doubt, is one of
+the diamond-making gang.”
+
+“Do you think he means you harm?”
+
+“I'm sure of it. That is the reason I have to act so in secret, and come
+to see you at night. I don't want those scoundrels to find out what I am
+about to do. On my return from Earthquake Island, I again endeavored to
+interest an airship man in my plan, but he evidently thought me insane.
+Then I thought of you, as I had done before, but I was afraid you, too,
+would laugh at my proposition. However, I decided to come here, and I
+did. It seemed almost providential that my first view of you was in
+a jewelry shop, looking at diamonds. I took it as a good omen. Now it
+remains with you. May I call here to-morrow night, and get your answer?”
+
+Tom Swift made up his mind quickly. After all it would be easy enough to
+find out if the diamonds were real. If they were, he could then decide
+whether or not to go with Mr. Jenks on the mysterious quest. So he
+answered:
+
+“I'll consider the matter, Mr. Jenks. I'll meet you here to-morrow
+night. In the meanwhile, for my own satisfaction, I'll let an expert
+look at these stones.”
+
+“Get the greatest diamond expert in the world, and he'll pronounce them
+perfect!” predicted the odd man. “Now I'll bid you goodnight, and be
+going. I'll be here at this time to-morrow.”
+
+As Mr. Jenks turned aside there was a movement among the trees in the
+orchard, and a shadowy figure was seen hurrying away.
+
+“Who's that?” asked the diamond man, in a hoarse whisper. “Did you see
+that, Tom Swift? Some one was here--listening to what I said! Perhaps it
+was the man who has been shadowing me!”
+
+“I think not. I guess it was Eradicate Sampson, a colored man who does
+work for us,” said Tom. “Is that you, Rad?” he called.
+
+“Yais, sah, Massa Tom, heah I is!” answered the voice of the negro,
+but it came from an entirely different direction than that in which the
+shadowy figure had been seen.
+
+“Where are you, Rad?” called the young inventor.
+
+“Right heah,” was the reply, and the colored man came from the direction
+of the stable. “I were jest out seein' if mah mule Boomerang were all
+right. Sometimes he's restless, an' don't sleep laik he oughter.”
+
+“Then that wasn't you over in the orchard?” asked Tom, in some
+uneasiness.
+
+“No, sah, I ain't been in de orchard. I were sleepin' in mah shack, till
+jest a few minutes ago, when I got up, an' went in t' see Boomerang.
+I had a dream dat some coon were tryin t' steal him, an' it sort ob
+'sturbed me, laik.”
+
+“If it wasn't your man, it was some one else,” said Mr. Jenks,
+decidedly.
+
+“We'll have a look!” exclaimed Tom. “Here, Rad, come over and scurry
+among those trees. We just saw some one sneaking around.”
+
+“I'll sure do dat!” cried the colored man. “Mebby it were somebody arter
+Boomerang! I'll find 'em.”
+
+“I don't believe it was any one after the mule,” murmured Mr. Jenks,
+“but it certainly was some one--more likely some one after me.”
+
+The three made a hasty search among the trees, but the intruder had
+vanished, leaving no trace. They went out into the road, which the moon
+threw into bold relief along its white stretch, but there was no figure
+scurrying away.
+
+“Whoever it was, is gone,” spoke Tom. “You can go back to bed, Rad,”
+ for the colored man, of late, had been sleeping in a shack on the Swift
+premises.
+
+“And I guess it's time for me to go, too,” added Mr. Jenks. “I'll be
+here to-morrow night, Tom, and I hope your answer will be favorable.”
+
+Tom did not sleep well the remainder of the night, for his fitful
+slumbers were disturbed by dreams of enormous caves, filled with
+diamonds, with dark, shadowy figures trying to put him into a red-hot
+steel box. Once he awakened with a start, and put his hand under his
+pillow to feel if the two stones Mr. Jenks had given him, were still
+there. They had not been disturbed.
+
+Tom made up his mind to find out if the stones were really diamonds,
+before saying anything to his father about the chance of going to seek
+Phantom Mountain. And the young inventor wished to get the opinion of
+some other jeweler than Mr. Track--at least, at first.
+
+“Though if this one proves to be a good gem, I'll have Mr. Track set it
+in a brooch, and give it to Mary for her birthday,” decided the young
+inventor. “Guess I'll take a run over to Chester in the Butterfly, and
+see what one of the jewelers there has to say.”
+
+In addition to his big airship, Red Cloud, Tom owned a small, swift
+monoplane, which he called Butterfly. This had been damaged by Andy
+Foger just before Tom left on the trip that ended at Earthquake Island,
+but the monoplane had been repaired, and Andy had left town, not having
+returned since.
+
+Telling his father that he was going off on a little business trip,
+which he often did in his aeroplane, Tom, with the aid of Mr. Jackson,
+the engineer, wheeled the Butterfly out of its shed.
+
+Adjusting the mechanism, and seeing that it was in good shape, Tom took
+his place in one of the two seats, for the monoplane would carry two.
+Mr. Jackson then spun the propellers, and, with a crackle and roar the
+motor started. Over the ground ran the dainty, little aeroplane, until,
+having momentum enough, Tom tilted the wing planes and the machine
+sailed up into the air.
+
+Rising about a thousand feet, and circling about several times to test
+the wind currents, Tom headed his craft toward Chester, a city about
+fifty miles from Shopton. In his pocket, snugly tucked away, were the
+two stones Mr. Jenks had given him.
+
+It was not long before Tom saw, looming up in the distance the church
+spires and towering factory chimneys of Chester, for his machine was a
+speedy one, and could make ninety miles an hour when driven. But now a
+slower speed satisfied our hero.
+
+“I'll just drop down outside of the city,” he reasoned, “for too much
+of a crowd gathers when I land in the street. Besides I might frighten
+horses, and then, too, it's hard to get a good start from the street.
+I'll leave it in some barn until I want to go back.”
+
+Tom sent his craft down, in order to pick out a safe place for a
+landing. He was then over the suburbs of the city, and was following the
+line of a straight country road.
+
+“Looks like a good place there,” he murmured. “I'll shut off the motor,
+and vol-plane down.”
+
+Suiting the action to the word, Tom shut off his power. The little craft
+dipped toward the ground, but the lad threw up the forward planes, and
+caught a current of air that sent him skimming along horizontally.
+
+As he got nearer to the ground, he saw the figure of a lad riding a
+bicycle along the country highway. Something about the figure struck Tom
+as being familiar, and he recognized the cyclist a moment later.
+
+“It's Andy Foger!” said Tom, in a whisper. “I wondered where he had been
+keeping himself since he damaged the Butterfly. Evidently he doesn't
+dare venture back to Shopton. Well, here's where I give him a scare.”
+
+Tom's monoplane was making no more noise, now, than a soaring bird. He
+was gliding swiftly toward the earth, and, with the plan in his mind of
+administering some sort of punishment to the bully, he aimed the machine
+directly at him.
+
+Nearer and nearer shot the monoplane, as quietly as a sheet of paper
+might fall. Andy pedaled on, never looking up nor behind him, A moment
+later, as Tom threw up his headplanes, to make his landing more easy,
+and just as he swooped down at one side of the cyclist, our hero let out
+a most alarming yell, right into Andy's ear.
+
+“Now I've got you!” he shouted. “I'll teach you to slash my aeroplane!
+Come with me!”
+
+Andy gave one look at the white bird-like apparatus that had flown up
+beside him so noiselessly, and, being too frightened to recognize Tom's
+voice, must have thought that he had been overtaken by some supernatural
+visitor.
+
+Andy gave a yell like an Indian, about to do a stage scalping act, and
+fairly dived over the handlebars of his bicycle, sprawling in a heap on
+the dusty road.
+
+“I guess that will hold you for a while,” observed Tom, grimly, as he
+put on the ground-brake and brought his monoplane to a stop not far from
+the fallen rider.
+
+
+
+
+CHAPTER V--A MYSTERIOUS MAN
+
+
+For several minutes Andy Foger did not arise. He remained prostrate in
+the dust, and Tom, observing him, thought perhaps the bully might have
+been seriously injured. But, a little later, Andy cautiously raised his
+head, and inquired in a frightened voice:
+
+“Is it--is it gone?”
+
+“Is what gone?” asked Tom, grimly.
+
+At the sound of his voice, Andy looked up. “Was that you, Tom Swift?” he
+demanded. “Did you knock me off my wheel?”
+
+“My monoplane and I together did,” was the reply; “or, rather, we
+didn't. It was the nervous reaction caused by your fright, and
+the knowledge that you had done wrong, that made you jump over the
+handlebars. That's the scientific explanation.”
+
+“You--you did it!” stammered Andy, getting to his feet. He wasn't hurt
+much, Tom thought.
+
+“Have it your own way,” resumed our hero. “Did you think it was a
+hob-goblin in a chariot of fire after you, Andy?”
+
+“Huh! Never mind what I thought! I'll have you arrested for this!”
+
+“Will you? Delighted, as the boys say. Hop in my airship and I'll take
+you right into town. And when I get you there I'll make a charge of
+malicious mischief against you, for breaking the propeller of the
+Butterfly and slashing her wings. I've mended her up, however, so she
+goes better than ever, and I can take you to the police station in jig
+time. Want to come, Andy?”
+
+This was too much for the bully. He knew that Tom would have a clear
+case against him, and he did not dare answer. Instead he shuffled over
+to where his wheel lay, picked it up, and rode slowly off.
+
+“Good riddance,” murmured Tom. He looked about, and saw that he was near
+a house, in the rear of which was a good-sized barn. “Guess I'll ask
+if I can leave the Butterfly there,” he murmured, and, ringing the
+doorbell, he was greeted by a man.
+
+“I'll pay you if you'll let me store my machine in the barn a little
+while, until I go into the city, and return,” spoke the lad.
+
+“Indeed, you're welcome to leave it there without pay,” was the answer.
+“I'm interested in airships, and, I'll consider it a favor if you'll let
+me look yours over while it's here.”
+
+Tom readily agreed, and a few minutes later he had caught a trolley
+going into the city. He was soon in one of the largest jewelry stores of
+Chester.
+
+“I'd like to get an expert opinion as to whether or not those stones are
+diamonds,” spoke Tom, to the polite clerk who came up to wait on him,
+and our hero handed over the two gems which Mr. Jenks had given him.
+“I'm willing to pay for the appraisement, of course,” the young inventor
+added, as he saw the clerk looking rather doubtfully at him, for Tom had
+on a rough suit, which he always donned when he flew in his monoplane.
+
+“I'll turn them over to our Mr. Porter, a gem expert,” said the clerk.
+“Please be seated.”
+
+The young man disappeared into a private office with the stones, and Tom
+waited. He wondered if he was going to have his trouble for his pains.
+Presently two elderly gentlemen came from the little room, on the glass
+door of which appeared the word “Diamonds.”
+
+“Who brought these stones in?” asked one of the men, evidently the
+proprietor, from the deference paid him by the clerk. The latter
+motioned to Tom.
+
+“Will you kindly step inside here?” requested the elderly man. When the
+door was closed, Tom found himself in a room which was mostly taken up
+with a bench for the display of precious stones, a few chairs, and some
+lights arranged peculiarly; while various scales and instruments stood
+on a table.
+
+“You wished an opinion on--on these?” queried the proprietor of the
+place. Tom noticed at once that the word “diamonds” was not used.
+
+“I wanted to find out if they were of any value,” he said. “Are they
+diamonds?”
+
+“Would you mind stating where you got them?” asked the other of the two
+men.
+
+“Is that necessary?” inquired the lad. “I came by them in a legitimate
+manner, if that's what you mean, and I can satisfy you on that point.
+I am willing to pay for any information you may give me as to their
+value.”
+
+“Oh, it isn't that,” the proprietor hastened to assure him. “But these
+are diamonds of such a peculiar kind, so perfect and without a flaw,
+that I wondered from what part of the world they came.”
+
+“Then they are diamonds?” asked Tom, eagerly.
+
+“The finest I have ever tested!” declared the other man, evidently Mr.
+Porter, the gem expert. “They are a joy to look at, Mr. Roberts,” he
+went on, turning to the proprietor. “If it is possible to get a supply
+of them you would be justified in asking half as much again as we charge
+for African or Indian diamonds. The Kimberly products are not to be
+compared to these,” and he looked at the two stones in his hand--the one
+cut, and sparkling brilliantly, the other in a rough state.
+
+“Do you care to state where these diamonds came from?” asked Mr.
+Roberts, looking critically at Tom.
+
+“I had rather not,” answered the lad. “It is enough for me to know that
+they are diamonds. How much is your charge?”
+
+“Nothing,” was the unexpected answer. “We are very glad to have had the
+opportunity of seeing such stones. Is there any chance of getting any
+more?”
+
+“Perhaps,” answered Tom, as he accepted the gems which the expert held
+out to him.
+
+“Then might we speak for a supply?” went on Mr. Roberts, eagerly. “We
+will pay you the full market price.”
+
+“What is the value of these stones?” asked Tom.
+
+Mr. Roberts looked at his gem expert.
+
+“It is difficult to say,” was the answer of the man who had handed Tom
+the gems. “They are so far superior to the usual run of diamonds, that
+I feel justified in saying that the cut one would bring fifteen hundred
+dollars, anywhere. In fact, I would offer that for it. The other is
+larger, though what it would lose in cutting would be hard to say. I
+should say it was worth two thousand dollars as it is now.”
+
+“Thirty-five hundred dollars for these two stones!” exclaimed Tom.
+
+“They are worth every cent of it,” declared Mr. Roberts. “Do you want to
+sell?”
+
+Tom shook his head. He could scarcely believe the good news. Mr. Jenks
+had told the truth. Now the young inventor could go with him to seek the
+diamond makers.
+
+“Can you get any more of these?” went on Mr. Roberts.
+
+“I think so--that is I don't know--I am going to try,” answered the lad.
+
+“Then if you succeed I wish you would sell us some,” fairly begged the
+proprietor of the store.
+
+“I will,” promised Tom, but he little knew what lay before him, or
+perhaps he would not have made that promise. He thanked the diamond
+merchant for his kindness, and arranged to have the cut stone set in a
+pin for Miss Nestor. The uncut gem Tom took away with him.
+
+Thinking of many things, and wondering how best to start in his airship
+Red Cloud for the mysterious Phantom Mountain, Tom hurried back to where
+he had left the monoplane, wheeled it out, and was soon soaring through
+the air toward Shopton.
+
+“I think I'll go with Mr. Jenks,” he decided, as he prepared for a
+landing in the open space near his aeroplane shed. “It will be a
+risky trip, perhaps, but I've taken risks before. When Mr. Jenks comes
+to-night I'll tell him I'll help him to get his rights, and discover the
+secret of the diamond makers.”
+
+As Tom was wheeling the Butterfly into the shed, Eradicate came out to
+help him.
+
+“Dere's a gen'man here to see yo', Massa Tom,” said the colored man.
+
+“Who is it?”
+
+“I dunno. He keep askin' ef yo' de lad what done bust up Earthquake
+Island, an' send lightnin' flashes up to de sky, an' all sech questions
+laik dat.”
+
+“It isn't Mr. Damon; is it, Rad? He hasn't been around in some time.”
+
+“No, Massa Tom, it ain't him. I knows dat blessin' man good an' proper.
+I jest wish he'd bless mah mule Boomerang some day, an' take some oh
+de temper out ob him. No, sah, it ain't Massa Damon. De gen'man's in de
+airship shed waitin' fo' you.”
+
+“In the airship shed! No strangers are allowed in there, Rad.”
+
+“I knows it, Massa Tom, but he done persisted his se'f inter it, an'
+he wouldn't come out when I told him; an' your pa an' Mr. Jackson ain't
+home.”
+
+“I'll see about this,” exclaimed Tom, striding to the large shed, where
+the Red Cloud was kept. As he entered it he saw a man looking over the
+wonderful craft.
+
+“Did you want to see me?” asked Tom, sharply, for he did not like
+strangers prowling around.
+
+“I did, and I apologize for entering here, but I am interested in
+airships, and I thought you might want to hire a pilot. I am in need
+of employment, and I have had considerable to do with balloons and
+aeroplanes, but never with an airship like this, which combines the two
+features. Do you wish to hire any one.”
+
+“No, I don't!” replied Tom, sharply, for he did not like the looks of
+the man.
+
+“I was told that you did,” was the rather surprising answer.
+
+“Who told you?”
+
+The man looked all around the shed, before replying, as if fearful of
+being overheard. Then, stepping close to Tom, he whispered:
+
+“Mr. Jenks told me!”
+
+“Mr. Jenks?” Tom could not conceal his astonishment.
+
+“Yes. Mr. Barcoe Jenks. But I did not come here to merely ask you for
+employment. I would like to hire out to you, but the real object of my
+visit was to say this to you.”
+
+The man approached still closer to Tom, and, in a lower voice, and one
+that could scarcely be heard, he fairly hissed:
+
+“Don't go with Barcoe Jenks to seek the diamond makers!”
+
+Then, before Tom could put out a hand to detain him, had the lad so
+wished, the man turned suddenly, and fairly ran from the shed.
+
+
+
+
+CHAPTER VI--MR. DAMON IS ON HAND
+
+
+The young inventor stood almost spellbound for a few moments. Then
+recovering himself he made a dash for the door through which the
+mysterious man had disappeared. Tom saw him sprinting down the road, and
+was half-minded to take after him, but a cooler thought warned him that
+he had better not.
+
+“He may be one of those men who are on Mr. Jenks' trail,” reasoned Tom,
+in which case it might not be altogether safe to attempt to stop him,
+and make him explain. Or he may be a lunatic, and in that case it
+wouldn't be altogether healthy to interfere with him.
+
+“I'll just let him go, and tell Mr. Jenks about him when he comes
+to-night. But I must warn Rad never to let him in here again. He might
+damage the airship.”
+
+Calling to the colored man, Tom pointed to the stranger, who was almost
+out of sight down the road, and said earnestly:
+
+“Rad, do you see that fellow?”
+
+“I sho do, Massa Tom, but I sorter has t' strain my eyes t' do it. He's
+goin' laik my mule Boomerang does when he's comm' home t' dinnah.”
+
+“That's right, Rad. Well, never let that man set foot inside our fence
+again! If he comes, and I'm home, call me. If I'm away, call dad or Mr.
+Jackson, and if you're here alone, drive him away, somehow.”
+
+“I will, Massa Tom!” exclaimed the colored man, earnestly, “an' if I
+can't do it alone, I'll get Boomerang t' help. Once let dat ar' mule
+git his heels on a pusson, an' dat pusson ain't goin' t' come bodderin'
+around any mo'--that is, not right away.”
+
+“I believe you, Rad. Well, keep a lookout for him, and don't let him
+in,” and with that Tom entered the house to think over matters. They
+were beginning to assume an aspect he did not altogether like. Not that
+Tom was afraid of danger, but he preferred to meet it in the open, and
+the warning, or threat, of the mysterious man disquieted him.
+
+When Mr. Swift came home, a little later, his son told him of the
+midnight interview with Mr. Jenks, for, up to this time, the aged
+inventor was unaware of it, and Tom also gave an account of the
+diamonds, speaking of their value.
+
+“And do you propose to go to Phantom Mountain, in search of the makers
+of these gems, Tom?” asked Mr. Swift.
+
+“I had about decided to do so, dad.”
+
+“And you're going in the Red Cloud?'
+
+“Yes.”
+
+“Who are going with you?”
+
+“Well, Mr. Jenks will go, of course, and I've no doubt but that if I
+mention the prospective trip to Mr. Damon, that he'll bless his skating
+cap, or something like that, and come along.”
+
+“I suppose so, Tom, and I'd like to have you take him. But I think
+you'll need some one else.”
+
+“Because, from what you have told me, you are going out to a dangerous
+part of the country, and you may have to deal with unscrupulous men.
+Three of you are hardly enough to cope with them. You ought to have at
+least another member of your party. If I was not busy on my invention of
+a new wireless motor I would go along, but I can't leave. You might take
+Mr. Jackson.”
+
+“No, you need him here to help you, dad.”
+
+“How about Eradicate?”
+
+Tom smiled.
+
+“Rad would get homesick for his mule Boomerang, and I'd have to bring
+him back just when we'd found the diamonds,” replied the young inventor.
+“No, we'll have to think of some one else. I'll ask Mr. Damon, and then
+I'll consider matters further. I expect to see Mr. Jenks to-night, and
+he may have some one in mind.”
+
+“Perhaps that will be a good plan. Well, Tom, I trust you will take good
+care of yourself, and not run into unnecessary danger. Is the Red Cloud
+in good shape for the voyage?”
+
+“It needs looking over. I'm going to get right at it.”
+
+“It's a pretty indefinite sort of a quest you're going on, Tom, my son.
+How do you expect to find Phantom Mountain?”
+
+“Well, it's going to be quite a task. In the first place we'll head for
+Leadville, Colorado, and then we'll go to Indian Ridge and make some
+inquiries. We may get on the track of the place that way. If we don't,
+why I'll take the airship up as high as is necessary and sort of
+prospect until we see that big cliff that's shaped like a head. That
+will give us something to go by.”
+
+“Well, do the best you can. If you can discover the secret of making
+diamonds it will be a valuable one.”
+
+“I guess it will, dad; and Mr. Jenks is entitled to know it, for he paid
+his good money to that end. He has promised to go halves with me, as
+payment for the use of the airship, and I must say the two diamonds he
+gave me last night have proved very valuable.”
+
+“Two diamonds, Tom? You only showed me one, an uncut gem;” and Mr. Swift
+looked at his son.
+
+“Oh, the other--er--the other is--I left it with a jeweler,” and Tom
+blushed a trifle, as he thought of the present he contemplated making to
+Mary Nestor.
+
+That afternoon, as Tom was out in the shed of the Red Cloud looking over
+the airship, to see what would be necessary to do to it in order to get
+it in shape for a long trip, he heard voices outside.
+
+“Yes--yes, I know the way in perfectly well,” he caught. “You needn't
+bother to come, my good fellow. Just step this way, and I'll show you
+something worth seeing.”
+
+“I wonder if it's that mysterious man coming back?” thought Tom. He
+dropped the tool he was using, and hurried to the door. As he approached
+it he heard the voice continue.
+
+“Why bless my shoe laces, Mr. Parker! You'll see a wonderful airship, I
+promise you. Wonderful! Bless my hatband, but I hope Tom is here!”
+
+“Mr. Damon!” exclaimed our hero, as he recognized the tones of his
+eccentric friend. “But who is with him?”
+
+A moment later he caught sight of the gentleman who was always blessing
+himself, or something. Behind him stood another man, whose features Tom
+could not see plainly.
+
+“Hello, Tom Swift!” called Mr. Damon. “Looking over the Red Cloud, eh?
+Does that mean you're off on another trip?”
+
+“I guess it does,” answered the lad.
+
+“Where to this time? if I may ask.”
+
+“I'm thinking of going off to the mountains to find a band of men
+engaged in making diamonds,” replied Tom.
+
+“Making diamonds! Bless my finger ring! Making diamonds! A trip to the
+mountains! Bless my disposition! but do you know I'd like to go with
+you!”
+
+“I was thinking of asking you, Mr. Damon.”
+
+“Were you? Bless my heart, I'm glad you thought of me. You don't by any
+possible chance want another person; do you?”
+
+“We were thinking of having four in the party, Mr. Damon,” and Tom
+wondered who was with his eccentric friend.
+
+“Then bless my election ticket! This is the very chance for you, Mr.
+Parker!” cried Mr. Damon. “Will you go with us? It will be just what you
+need,” and Mr. Damon stepped aside, revealing to Tom the features of Mr.
+Ralph Parker, the scientist who had correctly predicted the destruction
+of Earthquake Island.
+
+
+
+
+CHAPTER VII--MR. PARKER PREDICTS
+
+
+Tom Swift was a most generous lad, but when he saw that Mr. Damon had
+with him Mr. Parker, the gloomy scientist, who seemed to take delight in
+predicting disasters, our hero's spirits were not exactly of the best.
+He would have much preferred not to take Mr. Parker on the quest for the
+diamond makers, but, since Mr. Damon had mentioned it, he did not see
+how he could very well refuse.
+
+“But perhaps he won't care to go,” thought Tom.
+
+He was undeceived a moment later, however, for the scientist remarked:
+
+I am very glad to meet you once more, Mr. Swift. I have scarcely thanked
+you enough for what you did for us in erecting your wireless station on
+Earthquake Island, which, as you recall, I predicted would sink into
+the sea. It did, I am glad to say, not because I like to see islands
+destroyed, but because science has been vindicated. Now I have just
+heard you remark that you are about to set off to the mountains in
+search of some men who are making diamonds. I need hardly state that
+this is utterly useless, for no diamonds, commercially valuable, can be
+made by men. But the trip may be valuable in that it will permit me to
+demonstrate some scientific facts.
+
+“Therefore, if you will permit me, I will be very glad to accompany you
+and Mr. Damon. I shall be delighted, in short, and I can start as soon
+as you are ready.”
+
+“There's no hope for it!” thought Tom, dismally. “I suppose he'll wake
+up every morning, and predict that before night the world will come to
+an end, or he'll prophesy that the airship will blow up, and vanish,
+when about seven miles above the clouds. Well, there's no way out of it,
+so here goes.”
+
+Thereupon Tom welcomed the scientist as cordially as he could, and
+invited him to form one of the party that would set off in the airship
+to search for Phantom Mountain.
+
+“Bless my jewelry box!” exclaimed Mr. Damon, when this formality was
+over. “Tell me more about it, Tom.”
+
+Which our hero did, stating the need of maintaining secrecy on account
+of the danger to Mr. Jenks. Mr. Damon and Mr. Parker both agreed to say
+nothing about the matter, and then the scientist became much interested
+in the Red Cloud, which he closely examined. He even complimented Tom on
+the skill shown in making it, and, contrary to our hero's expectation,
+did not predict that it would blow up the next time it was used.
+
+“How did you happen to arrive just at this time, Mr. Damon?” asked Tom.
+
+“It was partly due to Mr. Parker,” was the answer. “I had not seen him
+since we were rescued from the island, until a few days ago he called
+on me at my home. I happened to mention that you lived near here, and
+suggested that he might like to see some of your inventions. He agreed,
+and we came over in my auto. And now, bless my liver-pin! I find you
+about to start off on another trip.”
+
+“And have you fully decided to go with me?” asked Tom. “There may be
+danger, and I don't like the way that mysterious man behaved.”
+
+“Oh, bless my revolver!” cried Mr. Damon. “I'm used to danger by this
+time. Of course I'm going, and so is Mr. Parker. Do you know,” and the
+man, who was always blessing something, came closer to the lad, and
+whispered: “Do you know, Tom, Mr. Parker is a very peculiar individual.”
+
+“I'm sure of it,” answered the young inventor, looking at the gentleman
+in question, who was then inside the airship cabin.
+
+“But he's all right, even if he is predicting unpleasant things,” went
+on Mr. Damon. “I think we'll get better acquainted with him after a
+bit.”
+
+“I hope so,” agreed Tom, but he did not realize then how close his
+companionship with Mr. Parker was to be, nor what dangers they were to
+share later.
+
+The friends talked at considerable length of the prospective trip, and
+Tom, by this time, had ascertained what needed to be done to the airship
+to get it in shape to travel. It would take about a week, and, in the
+meanwhile, Mr. Damon would go home and get his affairs in order for
+the voyage. Tom's father was introduced to Mr. Parker, and, the former,
+finding that the scientist held some views in common with him, invited
+the gloomy predictor to remain at the Swift home until the Red Cloud was
+ready to sail. Tom could not repress a groan at this, but he decided he
+would have to make the best of it.
+
+Mr. Damon left for home that afternoon, promising to be on hand at the
+time set to start for Phantom Mountain.
+
+Tom was up waiting for Mr. Jenks at twelve o'clock that night. Shortly
+after the hour he saw a dark figure steal into the orchard. At first he
+feared lest it might be one of the spies who were, he was now convinced,
+on the trail of the man who was seeking to discover the secret of the
+diamond makers. But a whistle, which came to the lad's ear a moment
+later (that being a signal Mr. Jenks had agreed to sound), told Tom that
+it was none other than the visitor he expected.
+
+“All right, Mr. Jenks, I'm here,” called Tom, cautiously. “Come over
+this way,” and he went out from the shadow of the house, where he had
+been waiting, and met the men. “We'll go into my private work-shop,” the
+youth added, leading the way.
+
+“Have you decided to go with me?” asked Mr. Jenks, in an anxious
+whisper. “Did you find the diamonds to be real ones?”
+
+“I did; and I'm going,” spoke Tom.
+
+“Good! That relieves my mind. But we are still in danger. I was followed
+by my shadower to-day, and only succeeded in shaking him off just before
+coming here. I don't believe he knows what I am about to do.”
+
+“Oh, yes he does,” said Tom.
+
+“He does? How?”
+
+“Because he was here, and warned me against you!”
+
+“You don't mean it! Well, they are getting desperate! We must be on our
+guard. What sort of a man was he?”
+
+Tom described the fellow, and Mr. Jenks stated that this tallied with
+the appearance of the person who had been shadowing him.
+
+“But we'll fool them yet!” cried Tom, who had now fully entered into the
+spirit of the affair. “If they can follow us in the Red Cloud they're
+welcome to. I think we'll get ahead of them.”
+
+He then told of Mr. Damon and Mr. Parker, and Mr. Jenks agreed that
+it would add to the strength of the party to take these two gentlemen
+along.
+
+“Though I can't say I care so much for Mr. Parker,” he added. “But now
+as to ways and means. When can we start?”
+
+Thereupon he and Tom talked over details in the seclusion of the little
+office, and arranged to leave Shopton in about a week. In the meanwhile
+the airship would be overhauled, stocked with supplies and provisions,
+and be made ready for a swift dash to the mountains.
+
+“And now I must be going,” said Mr. Jenks. “I have a great deal to do
+before I can start on this trip, and I hope I am not prevented by any of
+those men who seem to be trailing me.”
+
+“How could they prevent you?” Tom wanted to know.
+
+“Oh, there are any number of ways,” was the answer. “But I'm glad you
+found that my diamonds were real. We'll soon have plenty, if all goes
+well.”
+
+As Mr. Jenks left the shop, he started back, in some alarm.
+
+“What's the matter?” asked Tom.
+
+“Over there--I thought I saw a figure sneaking along under the
+trees--that man--perhaps--”
+
+“That's Eradicate, our colored helper,” replied Tom, with a laugh.
+“I posted him there to see that no strangers came into the orchard.
+Everything all right, Rad?” he asked, raising his voice.
+
+“Yais, sah, Massa Tom. Nobody been around yeah this night.”
+
+“That's good. You can go to bed now,” and Eradicate, yawning loudly,
+went to his shack. A little later Tom sought his own room, Mr. Jenks
+having hurried off to town, where he was boarding.
+
+The next few days saw Tom busily engaged on the airship, making some
+changes and a few repairs that were needed. His father, Eradicate and
+Mr. Jackson helped him. As for Mr. Parker, the scientist, he went about
+the place, being much interested in the various machines which Tom or
+Mr. Swift had patented.
+
+At other times the scientist would stroll about the extensive grounds,
+making what he said were “observations.” One afternoon Tom saw him,
+apparently much excited, kneeling down back of a shed, with his ear to
+the ground.
+
+“What is the matter?” asked the lad, thinking perhaps Mr. Parker might
+be ill.
+
+“Have you ever had any earthquakes here, Tom Swift?” asked the
+scientist, quietly.
+
+“Earthquakes? No. We had enough of them on the island.”
+
+“And you are going to have one here, in about two minutes!” cried Mr.
+Parker. “I predict that this place will be shaken by a tremendous shock
+very soon. We had all better get away from the vicinity of buildings.”
+
+“What makes you think there will be an earthquake?” asked Tom.
+
+“Because I can hear the rumbling beneath the ground at this very minute.
+It is increasing in volume, showing that the tremors are working this
+way. There will soon be a great subterranean upheaval! Listen for
+yourself.”
+
+Tom cast himself down on the grass. Placing his ear close to the ground
+he did hear a series of dull thuds. He arose, not a little alarmed.
+There had never been any earthquakes in Shopton, yet he had great
+respect for Mr. Parker's scientific attainments.
+
+Just then Eradicate Sampson came along. He saw Tom and Mr. Parker lying
+flat on the ground, and surprise showed on his honest, black face.
+
+“Fo' de land sakes!” cried Eradicate. “What am de mattah now, Massa
+Tom?”
+
+“Earthquake coming,” answered Tom, briefly. “Better get away from the
+buildings, Rad. They might fall!” Tom's face showed the alarm he felt.
+What would happen to all of his valuable machines--to the Red Cloud?
+
+“Earthquake?” murmured Eradicate, and he, too, cast himself down to
+listen. A moment later he arose with a laugh.
+
+“What's the matter?” cried Tom.
+
+“Why, dat ain't no earthquake!” declared the colored man.
+
+“No. Then perhaps you know what it is,” said Mr. Parker, somewhat
+sharply.
+
+“Course I knows what it am,” answered Eradicate, with dignity. “Dat
+noise am my mule Boomerang, kickin' in his stable, on account oh me not
+feedin' him yet. Dat's what it am. I'se gwine right now t' gib him his
+oats, and den yo' see dat de noise stop. Boomerang allers kick dat way
+when he's hungry. I show yo'!”
+
+And, sure enough, when Eradicate had gone to the mule's stable,
+which was near where Mr. Parker had heard the mysterious sounds, they
+immediately ceased.
+
+“Dat mule was all de earthquake dere was around here,” said the colored
+man as he came out.
+
+Mr. Parker walked away, saying nothing, and Tom did not make any
+comments--just then.
+
+
+
+
+CHAPTER VIII--OFF FOR THE WEST
+
+
+It was a great relief to Tom, to find that there was no danger from an
+earth tremor. Now that he had made up his mind to go in search of
+the diamond makers, he wanted nothing to interfere with it. Lest the
+feelings of Mr. Parker might be hurt by the mistake he had made, the
+young inventor cautioned Eradicate not to say anything more about the
+matter.
+
+“'Deed an' I won't,” the colored man promised. “I'se only too glad dere
+wa'n't no earthquake, dat's what I is.”
+
+As for Mr. Parker, he did not appear much put out by his error in
+predicting.
+
+“I am sure that what I heard was a tremor, due to some distant
+earthquake shock,” he said. “The mule's kicking was only a coincidence.”
+
+And Tom let him have his way about it. The week was drawing to a close,
+and the Red Cloud was nearly in shape for the voyage. At almost the
+last minute Tom found that he needed some electrical apparatus for the
+airship, and as he had to go to Chester for it, he decided he would make
+the trip in his monoplane, and, while in the city, would also get the
+diamond pin he was having made for Mary Nestor.
+
+He started off early one morning, in the swift little craft Butterfly,
+and soon had reached Chester. The diamond brooch was ready for him.
+
+“It is one of the most beautiful stones we have ever set,” the diamond
+merchant told him. “Don't forget, if you find any more, Mr. Swift, to
+let us have a chance to bid on them.”
+
+“I may,” Tom promised, rather indefinitely. Then, having purchased his
+electrical supplies, he made a quick trip to Shopton, stopping on the
+way to call on Miss Nestor.
+
+“Why Tom, I'm delighted to see you!” cried the girl, blushing prettily.
+“Did you come for some apple turnovers?” and she laughed, as she
+referred to a call Tom had once paid, when a new cook had been engaged,
+and when the pastry formed a feature of the meal.
+
+“No turnovers this time,” said the young inventor. “I came to wish you
+many happy returns of the day.”
+
+“Oh, you remembered my birthday! How nice of you!”
+
+“And here is something else,” added our hero, rather awkwardly, as he
+handed her the diamond pin.
+
+“Oh, Tom! This for me! Oh, it's too lovely--it's far too much!”
+
+“It isn't half enough!” he declared, warmly.
+
+“Oh, what a large diamond!” Mary cried as she saw the sparkling stone.
+“I never saw one so large and beautiful!”
+
+“It's just as easy to make them large as small,” explained Tom.
+
+“Make them?” she looked the surprise she felt.
+
+“Yes, I'm about to start for the place where diamonds are made.”
+
+“Oh, Tom! But isn't it dangerous? I mean won't you have to go to some
+far country--like Africa--to get to where diamonds are made?”
+
+“Well, we are going on quite a trip, but not as far as that. And as
+for the danger--well, we'll have to take what comes,” and he told her
+something of the proposed quest.
+
+“Oh, it sounds--sounds scary!” Mary exclaimed, when she had heard of Mr.
+Jenks' experience. “Do be careful, Tom!”
+
+“I will,” he promised, and, somehow he was glad that she had cautioned
+him thus--and in such tones as she had used. For Mary Nestor was a girl
+that any young chap would have been glad to have manifest an interest in
+him.
+
+“Well, I guess I'll have to say good-by,” spoke Tom, at length. “We
+expect to start in a couple of days, and I may not get another chance to
+see you.”
+
+“Oh, I--I hope you come back safely,” faltered Mary, and then she held
+out her hand, and Tom--well, it's none of our affair what Tom did
+after that, except to say that he hurried out, fairly jumped into his
+monoplane, and completed the trip home.
+
+As the Red Cloud has been fully described in the volume entitled “Tom
+Swift and His Airship,” we will not go into details about it now.
+Sufficient to say that it was a combination of a biplane and dirigible
+balloon. It could be used either as one or the other, and the gas-bag
+feature was of value when the wind was too great to allow the use of the
+planes, or when the motive power, for some reason stopped. In that event
+the airship could remain suspended far above the clouds if necessary.
+There was provision for manufacturing the gas on board.
+
+The Red Cloud was fitted up to accommodate about ten persons, though it
+was seldom that this number was carried. Two persons could successfully
+operate the machinery. There were sleeping berths, and in the main cabin
+a sitting-room, a dining-room, and a kitchen. There was also the motor
+compartment, and a steering tower, from which the engines could be
+controlled.
+
+It was in this craft that the seekers after the diamond makers proposed
+undertaking the trip. Mr. Damon came on from his home in Waterfield
+about two days before the date set to leave, and Mr. Jenks, had, three
+days before this, taken up his abode at the Swift home. Mr. Parker, as
+has been stated, was already there, and he had put in his time making
+a number of scientific observations, though he had made no more
+predictions.
+
+Nothing more had been seen of the mysterious man who had warned Tom,
+and the young inventor and Mr. Jenks began to hope that they had thrown
+their enemies off the track.
+
+“Though I don't imagine they'll give up altogether,” said Mr. Jenks.
+“They're too desperate for that. We'll have trouble with them yet.”
+
+“Well, it can't be helped,” decided Tom. “We'll try and be ready for it,
+when it comes,” and then, dismissing the matter from his mind, he busied
+himself about the airship.
+
+The food and supplies had all been put aboard, and they expected to
+start the next morning. In order to make sure that any stones which they
+might succeed in getting from the diamond makers were real gems, a set
+of testing apparatus was taken along. Mr. Parker had had some experience
+in this line, and, in spite of the fact that he might make direful
+predictions, Tom was rather glad, after all, that the scientist was
+going to accompany them.
+
+“But what is worrying me,” said Mr. Damon, “is what we are going to do
+after we get to Phantom Mountain. What are your plans, Mr. Jenks? Will
+you go in, and demand your share of the diamond-making business?”
+
+“I have a right to it, as I invested a large sum in it, and I am
+entitled to more than a half-share. But, of course, I can't say what
+I'll do until I get there. We may have to act very secretly.”
+
+“I'm inclined to think we will,” said Tom. “My plan would be to gain
+access to the cave, if possible, and watch them at work. We might be
+able to discover the secret of making diamonds, and, after all, that's
+what you want, isn't it, Mr. Jenks?”
+
+“Yes, I paid my money for the secret, and I ought to have it. If I can
+get it quietly, so much the better. If not, I'll fight for my rights!”
+ and he looked very determined.
+
+“Bless my powder horn!” cried Mr. Damon. “That's the way to talk! And
+so we're to go cruising about in the air, looking for a mountain shaped
+like a man's head.”
+
+“That's it,” agreed Mr. Jenks, “and when we find it we will be near
+Phantom Mountain, and the diamond makers.”
+
+The final details were completed that night. The last of the supplies
+had been put aboard, the larder was well stocked, the diamond testing
+apparatus was stored safely away, and all that remained was for the
+adventurers to board the Red Cloud in the morning, and soar away.
+
+That night Tom was uneasy. Several times he got up, and looked toward
+the shed where the airship was stored. He could not rid himself of
+the idea that the men to whose interest it was that the diamond-making
+secret remain undiscovered, might attempt to wreck the airship before
+the start. Consequently both Eradicate Sampson and Engineer Jackson were
+on guard. Tom looked from his window, to the shed where the Red Cloud
+was housed. He saw nothing to cause him any uneasiness.
+
+“I guess I'm just nervous,” he mused. “But, all the same, I'll be glad
+when we've started.”
+
+They were all up early the next morning, Mr. Damon beginning the day by
+blessing the sunrise, and many other things that struck his fancy.
+The airship was wheeled out of the shed, and Tom gave her a final
+inspection.
+
+“It's all right,” he declared. “All aboard!”
+
+“Now, do be careful,” begged Mr. Swift. “Don't take too many chances,
+Tom.”
+
+“I'll not.”
+
+The adventurers were in the forward part of the ship, and Tom had taken
+his place at the wheels and levers in the pilot house. As he was about
+to start the motor he looked toward the road, and saw a horse and
+carriage. In the vehicle was a girlish figure, at the sight of which Tom
+blushed and smiled. He waved his hand.
+
+“I came to wish you good luck!” cried Mary Nestor, for it was she in the
+carriage.
+
+“Thanks!” cried Tom, leaning from the window of the pilot house. “It was
+good of you to get up so early.”
+
+“Oh. I'm always up early,” she informed him.
+
+“Look out that the motor doesn't scare your horse,” Tom warned her.
+
+“Old Dobbin doesn't mind anything,” was her answer. “I'll see that he
+doesn't run away with me, as long as you're not on earth to rescue me.
+Good-by, Tom!”
+
+“Good-by!” he called, and then he pulled the lever that set in motion
+the motor, and whirled the great propellers about. They whizzed around
+with a roar, and the Red Cloud, shivering and trembling with the
+vibration, rose in the air like some great bird.
+
+“We're off for the West and Phantom Mountain!” called Tom to his
+companions.
+
+As the airship soared upward, Eradicate Sampson ran forward from where
+he had been standing near his mule Boomerang. He waved his hands, and
+shouted something.
+
+“Bless my hatband! What does he want?” asked Mr. Damon, watching him
+curiously.
+
+“It sounds as if he were calling to us to come back,” spoke Mr. Parker.
+
+“It's too late now,” decided Tom. “Maybe he forgot to tell us good-by,”
+ but, he felt a vague wonder at Eradicate's odd motions; for the colored
+man was pointing toward the stern of the airship, as if there was
+something wrong there. But the Red Cloud soared on.
+
+
+
+
+CHAPTER IX--A WARNING BY WIRELESS
+
+
+Rapidly the airship ascended, and, when it was high over the town of
+Shopton, Tom headed the craft due west. Looking down he tried to descry
+Mary Nestor, in her carriage, but the trees were in the way, their
+interlocking branches hiding the girl. Tom did see crowds of other
+persons, though, thronging the streets of Shopton, for, though the young
+inventor had made many flights, there was always a novelty about them,
+that brought out the curious.
+
+“A good start, Tom Swift,” complimented Mr. Parker. “Is it always as
+easy as this?”
+
+“Starting always is,” was the answer, “though, as the Irishman said,
+coming down isn't sometimes quite so comfortable.”
+
+“Bless my gizzard! That's so,” cried the eccentric Mr. Damon. “Can we
+vol-plane to earth in the Red Cloud, Tom?”
+
+“Yes, but not as easily as in the Butterfly. However I hope we will not
+have to. Now, Mr. Damon, if you will just take charge of the steering
+apparatus for a minute, I want to go aft.”
+
+“What for?”
+
+“I wish to see if everything is all right. I can't imagine why Eradicate
+was making those queer motions.”
+
+Mr. Damon, who knew how to operate the Red Cloud, was soon guiding her
+on the course, while Tom made his way to the rear compartments, through
+the motor room, where the stores of supplies and food were kept. He made
+a careful examination, looking from an after window, and even going out
+on a small, open platform, but could discover nothing wrong.
+
+“I guess Rad was just capering about without any special object,” mused
+Tom, but it was not long after this that they learned to their dismay,
+that the colored man had had a method in his madness.
+
+On his way back through the motor room Tom looked to the machinery,
+and adjusted some of the auxiliary oil feeders. The various pieces of
+apparatus were working well, though the engine had not yet been speeded
+up to its limit. Tom wanted it to “warm-up” first.
+
+“Everything all right?” asked Mr. Damon, as Tom rejoined them in the
+pilot house, which was just forward of the living room in the main
+cabin.
+
+“Yes, I can't imagine what made Rad act that way. But I'll set the
+automatic steering gear now, Mr. Damon, and then you will be relieved.”
+
+Mr. Jenks was gazing off toward the west--to where he hoped to discover
+the secret of Phantom Mountain.
+
+“How do you like it?” asked Tom.
+
+“It's great,” replied the diamond man. “I've never been in an airship
+before, and it's different than what I expected; but it's great! It's
+the only craft that will serve our purpose among the towering mountain
+peaks, where the diamond makers are hidden. I hope we can find them.”
+
+In a little while the Red Cloud was skimming along at faster speed,
+guided by the automatic rudders, so that no one was needed in the pilot
+house, since there was no danger of collisions. Airships are not quite
+numerous enough for that, yet, though they may soon become so.
+
+Tom and the others devoted several hours to arranging their staterooms
+and bunks, and getting their clothing stowed away, and when this was
+done Mr. Parker and Mr. Jenks sat gazing off into space.
+
+“It's hard to realize that we are really in an airship,” observed the
+diamond man. “At first I thought I would be frightened, but I'm not a
+bit. It doesn't seem as if anything could happen.”
+
+“Something is likely to happen soon,” said Mr. Parker, suddenly, as he
+gazed at some weather instruments on the cabin wall.
+
+“Bless my soul! Don't say that!” cried Mr. Damon. “What is it?”
+
+“I think, from my observations, that we will soon have a hurricane,”
+ said the scientific man. “There is every indication of it;” and he
+seemed quite delighted at the prospect of his prediction coming true.
+
+“A hurricane!” cried Mr. Damon. “I hope it isn't like the one that blew
+us to Earthquake Island.”
+
+“Oh, I think there will be no danger,” spoke Tom. “If it comes on to
+blow we will ascend or descend out of the path of the storm. This craft
+is not like the ill-fated Whizzer. I can more easily handle the Red
+Cloud; even in a bad storm.”
+
+“I'm glad to hear that,” remarked Mr. Jenks. “It would be too bad to be
+wrecked before we got to Phantom Mountain.”
+
+“Well, I predict that we will have a bad storm,” insisted Mr. Parker,
+and Tom could not help wishing that the scientist would keep his gloomy
+forebodings to himself.
+
+However the storm had not developed up to noon, when Tom, with Mr.
+Damon's help, served a fine meal in the dining-room. In the afternoon
+the speed of the ship was increased, and by night they had covered
+several hundred miles. Through the darkness the Red Cloud kept on,
+making good time. Tom got up, occasionally, to look to the machinery,
+but it was all automatically controlled, and an alarm bell would sound
+in his stateroom when anything went wrong.
+
+“Bless my napkin!” exclaimed Mr. Damon the next morning, as they sat
+down to a breakfast of fruit, ham and eggs and fragrant coffee, “this is
+living as well as in a hotel, and yet we are--how far are we above the
+earth, Tom?” he asked, turning to the young inventor.
+
+“About two miles now. I just sent her up, as I thought I detected that
+storm Mr. Parker spoke of.”
+
+“I told you it would come,” declared the scientist, and there was a
+small hurricane below them that morning, but only the lower edge of it
+caught the Red Cloud, and when Tom sent her up still higher she found a
+comparatively quiet zone, where she slid along at good speed.
+
+That afternoon Tom busied himself about some wires and a number of
+complicated pieces of apparatus which were in one corner of the main
+cabin.
+
+“What are you doing now?” asked Mr. Jenks, who had been talking with Mr.
+Parker, and showing that scientist some of the manufactured diamonds.
+
+“Getting our wireless apparatus in shape,” answered the lad. “I should
+have done it before, but I had so much to do that I couldn't get at it.
+I'm going to send off some messages. Dad will want to know how we are
+doing.”
+
+As he worked away, he also made up his mind to send another message, in
+care of his father, for there was a receiving station in the Swift home.
+And to whom this message was addressed Tom did not say, but we fancy
+some of our readers can guess.
+
+Finally, after several hours of work, the wireless was in shape to send
+and receive messages. Tom pulled over the lever, and a crackling sound
+was heard, as the electricity leaped from the transmitters into space.
+Then he clamped the receiver on his ear.
+
+“All ready,” he announced. “Has anybody any messages they wish sent?”
+ For, with the courtesy of a true host he was ready to serve his guests
+before he forwarded his own wireless notes.
+
+“Just tell my wife that I'm enjoying myself,” requested Mr. Damon.
+“Bless my footstool! But this is great! We're off the earth yet,
+connected with it.”
+
+Mr. Jenks had no one to whom he wanted to send any word, but Mr. Parker
+wish to wire to a fellow scientist the result of some observations made
+in the upper air.
+
+Tom noted all the messages down, and then, when all was in readiness he
+began to call his home station. He knew that either his father or Mr.
+Jackson, the engineer, could receive the wireless.
+
+But, no sooner had the young inventor sent off the first few dots and
+dashes representing “S. I.”--his home station call--than he started and
+a look of surprise came over his face.
+
+“They're calling us!” he exclaimed.
+
+“Who is?” asked Mr. Jenks.
+
+“My house--my father. He--he's been trying to get us ever since we
+started, but I didn't have the wireless in shape to receive messages.
+Oh, I hope it's not too late!”
+
+“Too late! Bless my soul, too late for what?” gasped Mr. Damon, somewhat
+alarmed by Tom's manner.
+
+The lad did not answer at once. He was intently listening to a series
+of dots and dashes that clicked in the telephone receiver clamped to his
+left ear. On his face there was a look of worriment.
+
+“Father has just sent me a message,” he said. “It's a warning flashed
+through space! He's been trying to get it to me since yesterday!”
+
+“What is it?” asked Mr. Jenks, rising from his seat.
+
+“The mysterious man is aboard the airship--hidden away!” cried Tom.
+“That's what Eradicate was trying to call to our attention as we started
+off. Eradicate saw his face at a rear window, and tried to warn us! The
+mysterious man is a stowaway on board!”
+
+
+
+
+CHAPTER X--DROPPING THE STOWAWAY
+
+
+Tom's excited announcement startled Mr. Damon and the others as much as
+if the young inventor had informed them that the airship had exploded
+and was about to dash with them to the earth. The men leaped to their
+feet, and stared at the lad.
+
+“A stowaway on board!” cried Mr. Damon. “Bless my soul! How did he--”
+
+“Are you sure that message is straight?” asked Mr. Jenks. “Did Eradicate
+see the man?”
+
+“He says he did,” answered Tom. “The man is hidden away on board
+now--probably among the stores and supplies.”
+
+“Bless my tomato sauce!” exploded Mr. Damon. “I hope he doesn't eat them
+all up!”
+
+“We must get him out at once!” declared Mr. Jenks.
+
+“I knew something would happen on this voyage,” came from Mr. Parker. “I
+predicted it from the first!”
+
+Tom thought considerable, but he did not answer the scientist just
+then. Another communication was coming to him by wireless. He listened
+intently.
+
+“Father says,” the lad told his companions “that Eradicate only had
+a glimpse of the man at the last moment. He was looking from the rear
+storeroom window--he's the same man who called on me that time--Rad
+remembers him very well.”
+
+“Bless my shoes! What's to be done?” inquired Mr. Damon, looking around
+helplessly.
+
+“We must get him out, that's all,” decided Mr. Jenks; with vigor. “Get
+him out and drop him overboard!”
+
+“Drop him overboard!” cried Mr. Parker, in horror.
+
+“Not exactly, but get rid of him,” proceeded the diamond seeker. “That
+man is one of my enemies. He has been sent by the band of diamond makers
+hidden among the mountains, to spy on me, and, if possible, prevent me
+from seeking to discover their secret. He tried to work on Tom's Swift's
+fears, and frighten him from using his airship on this quest. Then, when
+he failed, the man must have sneaked into the shed, and hidden himself
+in the ship. We must get rid of him, or he may wreck the Red Cloud!”
+
+“That's so!” cried Tom. “We must try to capture him. I think we had
+better--” the lad paused, and again listened to the wireless message.
+“Father says Eradicate saw the man have a gun, so we must be careful,”
+ the young inventor translated the dots and dashes.
+
+“Bless my powder horn!” exploded Mr. Damon.
+
+“We shall have to proceed cautiously then,” spoke Mr. Jenks. “If he is
+like any others in the gang he is a desperate man.”
+
+“Better sneak up on him then, if we can,” proposed Mr. Parker. “There
+are enough of us to cope with one man, even if he is armed. You have
+weapons aboard, haven't you?” he inquired of Tom.
+
+“Yes,” was the hesitating answer, “but I don't want to use them if I
+can help it. Not only because of the danger, and a dislike of shedding
+blood, but because a stray bullet might pierce the gas bag and damage
+the ship.”
+
+“That's so,” agreed Mr. Jenks. “Well, I guess if we go at it the right
+way we can capture him without any shooting. But we must talk more
+quietly--we ought to have whispered--he may have heard us.”
+
+“I don't think so,” replied Tom. “The storeroom is far enough off so
+that he couldn't hear us. Besides, the motor makes such a racket that
+he couldn't distinguish what we were talking about, even if he heard our
+voices. So, unless he heard the wireless working, and suspects something
+from that, he probably doesn't know that we are aware of his presence
+aboard.”
+
+“But why do you think he has remained quiet all this while, Tom?” asked
+Mr. Damon.
+
+“Probably he wants to wait until the ship is farther out west,”
+ suggested Mr. Jenks. “Then he will be nearer his friends, and can get
+help, if he needs it.”
+
+“And do you really believe he would destroy the Red Cloud?” asked Mr.
+Parker.
+
+“I think that all he is waiting for is a favorable chance,” declared
+the diamond seeker. “He would destroy the craft, and us too, if he could
+prevent us from discovering the secret of Phantom Mountain, I believe.”
+
+“Then we must get ahead of him,” decided Tom, quietly. “I have just
+flashed to dad a message, telling him that we will heed his warning. Now
+to capture the stowaway!”
+
+“And while we're about it, give him a good scare when we do get him,”
+ suggested Mr. Jenks.
+
+“How?” asked Tom.
+
+“Threaten to drop him overboard. Perhaps that will make him tell how
+he happened to get in our ship, and what are the plans of the gang of
+diamond makers. We may get valuable information that way.”
+
+“I don't believe you can scare such fellows much,” was Tom's opinion,
+but it was agreed to try.
+
+“How are you going to capture him?” asked Mr. Parker. “If he has a gun
+it won't be any too easy to go in the storeroom, and drag him out.”
+
+“We'll have to use a little strategy,” decided Tom, and then they
+discussed several plans. The one finally adopted was that Tom and Mr.
+Damon should enter the storeroom, casually, as if in search of food to
+cook for supper. They would discuss various dishes, and Mr. Damon was to
+express a preference for something in the food line, the box containing
+which, was well back in the room. This would give the two a chance
+to penetrate to the far end of the apartment, without arousing the
+suspicions of the hidden man, who, doubtless, would be listening to the
+conversation.
+
+“And as soon as we get sight of him, you and I will jump right at him,
+Mr. Damon,” said Tom. “Jump before he has a chance to use his gun. Mr.
+Jenks and Mr. Parker will be waiting outside the room, to catch him if
+he gets away from us. I'll have some ropes ready, and we'll tie him up,
+and--well, we'll decide later what to do with him.”
+
+“All right. I'm ready as soon as you are, Tom,” said the eccentric man.
+“Come ahead.”
+
+They went softly to the storeroom, and listened at the door. There was
+no sound heard save that made by the machinery.
+
+“I wonder if he's really here?” whispered Mr. Damon.
+
+“We'll soon find out,” answered Tom. “Let's go in.”
+
+They entered, and, in pursuance of their plan, Tom and his friend talked
+of various foods.
+
+“I think I'd like some of that canned lobster, with French dressing on,”
+ spoke the eccentric man.
+
+“That's away in the back end of the room,” said Tom, in a loud voice.
+“It's under a lot of boxes.”
+
+“Then I'll help you get it out! Bless my frying pan! but I am very fond
+of lobster!” exclaimed Mr. Damon, in as natural tones as was possible
+under the circumstances.
+
+He and Tom moved cautiously back among the boxes and barrels. They were
+glancing about with eager eyes. Tom switched on an electric light, and,
+the instant he did so, he was aware of a movement in a little space
+formed by one box which was placed on top, of two others. The lad saw a
+dark figure moving, as if to get farther out of sight.
+
+“I've got him!” cried Tom, making a dive for the shadow.
+
+A moment later the young inventor was bowled over, as a dark figure
+leaped over his head.
+
+“Catch him, Mr. Damon!” he cried.
+
+“Bless my hatband! I--I--” Mr. Damon's voice ended in a grunt. He, too,
+had been knocked down by the fleeing man.
+
+“Look out, Mr. Jenks!” cried Tom, to warn those on guard at the door of
+the storeroom.
+
+There was the report of a gun, some excited shouts, and when Tom could
+scramble to his feet, and rush out, he beheld Mr. Parker calmly sitting
+on a struggling man, while Mr. Jenks held a gun, that was still smoking.
+
+“We caught him!” cried the scientist.
+
+“Anybody hurt?” asked Tom, anxiously.
+
+“No, I knocked up his gun as he fired,” explained Mr. Jenks. “Where are
+the ropes, Tom?”
+
+The cords were produced and the man, who had now ceased to struggle,
+was tightly bound. He uttered not a word, but he smiled grimly when Mr.
+Damon remarked:
+
+“I guess I'll go back in the storeroom, Tom, and see how much food he
+ate.”
+
+“Oh, I guess he didn't take much,” declared the lad. “He wasn't there
+long enough.”
+
+“Well, Farley Munson, so it's you, is it?” asked Mr. Jenks, as he
+surveyed the prisoner.
+
+“Do you know him?” asked Tom, in some surprise.
+
+“He was in with the diamond makers,” said Mr. Jenks. “He was one of
+those who took me to the secret cave. But it will be the last time he
+ever goes there. How high up are we, Tom?”
+
+“About two miles. Why?”
+
+“I guess that will be far enough to let him fall,” went on the diamond
+seeker. “Come on, Mr. Damon, help me throw him overboard!”
+
+“You--you're not going to throw me over--with the airship two miles
+high; are you?” gasped the man.
+
+“Will you tell us what we want to know, if we don't?” asked Mr. Jenks.
+
+“What do you want to know?”
+
+“How you got aboard, and what your object was in coming.”
+
+“That's easy enough. I had been hanging around the shed for several
+days, watching a chance to get in. Finally I saw it, when that colored
+man went to feed his mule, and I slipped in, and hid in the airship. The
+stores were all in then, and I stowed myself away among the boxes. I had
+food and water, so I didn't touch any of yours,” and he looked at Mr.
+Damon, who seemed much relieved.
+
+“And what was your object?” demanded Mr. Jenks.
+
+“I wanted to prevent you from going to Phantom Mountain.”
+
+“How?”
+
+“By destroying the airship if need be. But I hoped to accomplish it by
+other means. I would have stopped at nothing, though, to prevent you.
+You must keep away from there!”
+
+“And if we refuse?” asked Tom.
+
+“Then you'll have to take what comes!”
+
+“But not from you!” exclaimed Mr. Jenks. “We're going to get rid of
+you.”
+
+The man's face showed the alarm he felt.
+
+“Oh, don't worry,” said Mr. Jenks, quickly, “we're not going to toss you
+overboard. We're not as desperate as your crowd. But we're going to
+get rid of you, and then go on before you can send any word to your
+confederates. We'll put you off in the most lonesome spot we can find,
+and I guess you'll be some time getting back to civilization. By that
+time we'll have the secret of the diamonds.”
+
+“You never will!” declared the man, firmly. And he would say nothing
+more, though by threats and promises Mr. Jenks tried to get from him
+something about the men in with him, and where the cave of the diamonds
+was located.
+
+Heavily bound with ropes the man was locked in a small closet, to be
+kept there until a favorable spot was reached for letting him go. Mr.
+Jenks' plan, of dropping him down in some place where he would have
+difficulty in sending on word to his confederates was considered a good
+one.
+
+Three days later, in crossing over a lonely region, near the Nebraska
+National Forest, Farley Munson, which was one of the names the spy went
+by, was dropped off the airship, when it was sent down to within a few
+feet of the earth.
+
+“It will take you some time to get to a telegraph office,” said Mr.
+Jenks, as a package of food, and a flask of water was tossed down to the
+stowaway. He shook his fist at those in the airship, and shouted after
+them:
+
+“You'll never discover the secret of Phantom Mountain!”
+
+“Yes, we will,” declared Tom, as he sent the Red Cloud high into the air
+again.
+
+
+
+CHAPTER XI--A WEARY SEARCH
+
+
+During the three days when the stowaway had been kept a prisoner, the
+Red Cloud had made good time on her western trip. She was now about two
+hundred and fifty miles from Leadville, Colorado, and Tom knew he could
+accomplish that distance in a short time. It was necessary, therefore,
+since they were so close to the place where the real search would begin,
+to make some more definite plans.
+
+“We will need to replenish our supply of gasoline,” said Tom, shortly
+after the stowaway had been dropped, and when the young inventor had
+made a general inspection of the airship.
+
+“Is it all gone?” inquired Mr. Damon.
+
+“Not all, but we will soon be in the wildest part of the Rocky
+Mountains, and gasoline is difficult to procure there. So I want to fill
+all our reserve tanks. But I would rather do that before we get far into
+Colorado.”
+
+“Why?” inquired Mr. Parker.
+
+“Because airships are not so common but what the appearance of one
+attracts attention. Ours is sure to be talked about, and commented on.
+In that case, in spite of our precaution in putting Munson off in this
+lonely place, word of the Red Cloud being in the vicinity of Leadville
+may reach the diamond makers, and put them on their guard. We want to
+take them unawares if we can.”
+
+“That's so,” agreed Mr. Jenks. “We had better get our gasoline at the
+first stopping place, then, and proceed with our search. Our first
+object ought to be to look for the landmark--the head of stone. Then we
+can begin to prospect about a bit.”
+
+“My idea, exactly,” declared Tom. “Well, then, I'll go down at the
+first place we cross, where we can get gasoline, and then we'll be in a
+position to hover in the air for a long time, without descending.”
+
+The airship kept on her way, traveling slowly the remainder of that day,
+and at dusk, when there was less chance of big crowds seeing them, the
+Red Cloud was sent down on the outskirts of a large village. Tom and Mr.
+Damon went to a supply store, and arranged to have a sufficient quantity
+of the gasoline taken out to the airship. It was delivered after dark,
+and little talk was occasioned by the few who were aware of the presence
+of the craft. Then, once more, they went aloft, and Tom sent several
+wireless messages to Shopton, including one to Miss Nestor.
+
+“Please tell my wife that I am well, and that I have a good appetite,”
+ said Mr. Damon.
+
+Mr. Parker also sent a message to a scientific friend of his, stating
+that he made some observations among the mountains, of the region in
+which the airship then was, and that the indications were that a great
+landslide would soon take place.
+
+“That won't worry us,” spoke Tom, “for we'll be far above it.”
+
+“I hope we will be near enough to enable me to observe it, and make
+some scientific notes,” came from Mr. Parker. “I am positive that one
+of these mountain peaks that we saw to-day will disappear in a landslide
+within a few days. I have an instrument somewhat like the one that
+records earthquakes, and it has been acting strangely of late.”
+
+Tom wondered what enjoyment Mr. Parker got out of life, when he was
+always looking for some calamity to happen, but the scientist seemed
+to take as much pleasure in his gloomy forebodings now, as he had on
+Earthquake Island.
+
+They reached the vicinity of Leadville the next day, but took care to
+keep high above the city, so that the airship could not be observed.
+With powerful glasses they examined the mountainous country, looking for
+the little settlement of Indian Ridge.
+
+“There it is!” exclaimed Mr. Jenks, just as dusk was settling down. “I
+can make out the hotel I stopped at. Now we can really begin our search.
+The next thing is to find the stone head, and then, I think, I will have
+my bearings.”
+
+“We'll begin the hunt for that landmark in the morning,” said Tom.
+
+High in the air hovered the Red Cloud. At that distance above the earth
+she must have looked like some great bird, and the adventurers thought
+it unlikely that any one in the vicinity of Leadville would observe
+them.
+
+The quest for the great mountain peak, that looked like a stone head,
+was under way. Back and forth sailed the airship. Sometimes she was
+enveloped in fog, and no sight could be had of the earth below. At
+other times there were rain storms, which likewise prevented a view. Mr.
+Parker was on the lookout for his predicted mountain landslide, but it
+did not occur, and he was much disappointed.
+
+“It's queer I can't pick out that landmark,” said Mr. Jenks after two
+days of weary searching, when their eyes were strained from long peering
+through telescopes. “I'm sure it was around Indian Ridge, yet we've
+covered almost all the ground in this neighborhood, and I haven't had a
+glimpse of it.”
+
+“Perhaps it was destroyed in a landslide, or some cataclysm of nature,”
+ suggested Mr. Parker. “That is very possible.”
+
+“If that's the case we're going to have a hard time to locate the cave
+of the diamond makers,” answered Mr. Jenks, “but I hope it isn't so.”
+
+They continued the search for another day, and then Tom, as they sat
+in the comfortable cabin of the airship that night, hovering almost
+motionless (for the motor had been shut down) made a proposition.
+
+“Why not descend in some secluded place,” he suggested, “and wander
+around on foot, making inquiries of the miners. They may know where the
+stone head is, or they may even know about Phantom Mountain.”
+
+“Good idea,” spoke Mr. Jenks. “We'll do it.”
+
+Accordingly, the next morning, the Red Cloud was lowered in a good but
+lonely landing place, and securely moored. It was in a valley, well
+screened from observation, and the craft was not likely to be seen,
+but, to guard against any damage being done to it by passing hunters or
+miners, Mr. Parker and Mr. Damon agreed to remain on guard in it, while
+Tom and Mr. Jenks spent a day or two traveling around, making inquiries.
+
+The young inventor and his companion proceeded on foot to a small
+settlement, where they hired horses on which to make their way about.
+They were to be gone two days, and in that time they hoped to get on the
+right trail.
+
+
+
+
+CHAPTER XII--THE GREAT STONE HEAD
+
+
+It was a wild and desolate country in which Tom Swift and Mr. Jenks
+were traveling. Villages were far apart, and they were at best but
+small settlements. In their journeys from place to place they met few
+travelers.
+
+But of these few they made cautious inquiries as to the location
+of Phantom Mountain, or the landmark known as the great stone head.
+Prospectors, miners and hunters, whom they asked, shook their heads.
+
+“I've heard of Phantom Mountain,” said one grizzled miner, “but I
+couldn't say where it is. Maybe it's only a fish story--the place may
+not even exist.”
+
+“Oh, it does, for I've been there!” exclaimed Mr. Jenks.
+
+“Then why don't you go back to it?” asked the miner.
+
+“Because I can't locate it again,” was the reply.
+
+“Humph! Mighty queer if you've seen a place once, and can't get to it
+again,” and the man looked as if he thought there was something strange
+about Tom and his companion. Mr. Jenks did not want to say that he had
+been taken to the mountain blindfolded, for that would have caused too
+much talk.
+
+“I think if we spent to-night in a place where the miners congregate,
+listened to their talk, and put a few casual questions to them, more as
+if we were only asking out of idle curiosity, we might learn something,”
+ suggested Tom.
+
+“Very well, we'll try that scheme.”
+
+Accordingly, after they had left the suspicious miner the two proceeded
+to a small milling town, not far from Indian Ridge. There they engaged
+rooms for the night at the only hotel, and, after supper they sat around
+the combined dance hall and gambling place.
+
+There were wild, rough scenes, which were distasteful to Tom, and to Mr.
+Jenks, but they felt that this was their only chance to get on the right
+trail, and so they stayed. As strangers in a western mining settlement
+they were made roughly welcome, and in response to their inquiries about
+the country, they were told many tales, some of which were evidently
+gotten up for the benefit of the “tenderfeet.”
+
+“Is there a place around here called Phantom Mountain?” asked Tom, at
+length, as quietly as he could.
+
+“Never heard of it, stranger,” replied a miner who had done most of the
+talking. “I never heard of it, and what Bill Slatterly don't know ain't
+worth knowin'. I'm Bill Slatterly,” he added, lest there be some doubt
+on that score.
+
+“Isn't there some sort of a landmark around here shaped like a great
+stone head?” went on Tom, after some unimportant questions. “Seems to me
+I've heard of that.”
+
+“Nary a one,” answered Mr. Slatterly. “No stone heads, and no Phantom
+Mountains--nary a one.
+
+“Who says there ain't no Phantom Mountains?” demanded an elderly miner,
+who had been dozing in one corner of the room, but who was awakened by
+Slatterly's loud voice. “Who says so?”
+
+“I do,” answered the one who claimed to know everything.
+
+“Then you're wrong!” Tom's heart commenced beating faster than usual.
+
+“Do you mean to say you've seen Phantom Mountain, Jed Nugg?” demanded
+Slatterly.
+
+“No, I ain't exactly seen it, an' I don't want to, but there is such
+a place, about sixty mile from here. Folks says it's haunted, and them
+sort of places I steer clear from.”
+
+“Can you tell me about it?” asked Mr. Jenks, eagerly. “I am interested
+in such things.”
+
+“I can't tell you much about it,” was the reply, “and I wouldn't git too
+interested, if I was you. It might not be healthy. All I know is that
+one time my partner and I were in hard luck. We got grub-staked, and
+went out prospectin'. We strayed into a wild part of the country about
+sixty mile from here, and one night we camped on a mountain--a wild,
+desolate place it was too.”
+
+The miner stopped, and began leisurely filling his pipe.
+
+“Well?” asked Tom, trying not to let his voice sound too eager.
+
+“Well, that was Phantom Mountain.”
+
+The miner seemed to have finished his story.
+
+“Is that all?” asked Mr. Jenks. “How did you know it was Phantom
+Mountain?”
+
+“'Cause we seen the ghost--my partner and I--that's why!” exclaimed the
+man, puffing on his pipe. “As I said, we was campin' there, and 'long
+about midnight we seen somethin' tall and white, and all shimmerin',
+with a sort of yellow fire, slidin' down the side of the mountain. It
+made straight for our camp.”
+
+“Huh! Guess you run, didn't you, Jed?” asked Bill Slatterly.
+
+“Course we did. You'd a run too, if you seen a ghost comm' at you, an'
+firin' a gun.”
+
+“Ghosts can't fire guns!” declared Bill. “I guess you dreamed it, Jed.”
+
+“Ghosts can't fire guns, eh? That's all you know about it. This one did,
+and to prove I didn't dream it, there was a bullet hole in my hat next
+mornin'. I could prove it, too, only I ain't got that hat any more. But
+that was Phantom Mountain, strangers, an' my advice to you is to keep
+away from it. I was on it but I didn't exactly see it, 'cause it was
+dark at the time.”
+
+“Was it near a peak that looked like a stone head?” asked Tom.
+
+“It were, stranger, but I didn't take much notice of it. Me and my
+partner got out of them diggin's next day, and I never went back. I
+ain't never said much about this place, but it's called Phantom Mountain
+all right, and I ain't the only one that's seen a ghost there. Other
+grub-stakers has had the same experience.”
+
+“Why ain't I never heard about it?” demanded Bill, suspiciously.
+
+“'Cause as why you're allers so busy talkin' that you don't never listen
+to nothin' I reckon,” was Jed's answer, amid laughter.
+
+“Can you tell us what trail to take to get there?” asked Tom, of the
+miner.
+
+“Yes, it's called the old silver trail, and you strike it by goin' to a
+place called Black Gulch, about forty mile from here. Then it's twenty
+mile farther on. But take my advice and don't go.”
+
+“Can it be reached by way of Indian Ridge?” asked Mr. Jenks, wondering
+how he had been taken to the cave of the diamond makers. He did not
+remember Black Gulch.
+
+“Yes, you can git there by Indian Ridge way, but it's more dangerous.
+You're likely to lose your way, for that's a trail that's seldom
+traveled.” Mr. Jenks thought that, perhaps, was the reason the gang had
+taken him that way. “It's easier to get to the stone head and Phantom
+Mountain by Black Gulch, but it ain't healthy to go there, strangers,
+take my advice on that,” concluded the miner, as he prepared to go to
+sleep again.
+
+Tom could scarcely contain the exultation he felt. At last, it seemed,
+they were on the trail. He motioned to Mr. Jenks, and they slipped
+quietly from the place, just as another dance was beginning.
+
+“Now for Black Gulch!” cried Tom. “We must hurry back to the airship,
+and tell the good news.
+
+“It's too late to-night,” decided Mr. Jenks, and so they waited until
+morning, when they made an early start.
+
+They found Mr. Damon and Mr. Parker anxiously awaiting their return. Mr.
+Damon blessed so many things that he was nearly out of breath, and Mr.
+Parker related something of the observations he had made.
+
+“I think I have discovered traces of a dormant volcano,” he said. “I am
+in hopes that it will have an eruption while we are here.”
+
+“I'm not,” spoke Tom, decidedly. “We'll start for Black Gulch as soon as
+possible.”
+
+The airship once more rose in the air, and, following the directions
+the miner had given him, Tom pointed his craft for the depression in the
+mountains which had been given the name Black Gulch. It was reached in
+a short time, and then, making a turn up a long valley the airship
+proceeded at reduced speed.
+
+“We ought to see that stone head soon now,” spoke Tom, as he peered from
+the windows of the pilot house.
+
+“It's queer we didn't notice it when we were up in the air,” remarked
+Mr. Jenks. “We've been over this place before, I'm sure of it.”
+
+The next moment Mr. Damon uttered a cry. “Bless my watch-chain!” he
+exclaimed. “Look at that!”
+
+He pointed off to the left. There, jutting out from the side of a steep
+mountain peak was a mass of stone--black stone--which, as the airship
+slowly approached, took the form and shape of a giant's head.
+
+“That's it! That's it!” cried Tom. “The great stone head!”
+
+“And now for Phantom Mountain and the diamonds!” shouted Mr. Jenks, as
+Tom let the airship slowly settle to the bottom of the valley.
+
+
+
+
+CHAPTER XIII--ON PHANTOM MOUNTAIN
+
+
+Out from the Red Cloud piled Tom and the others. They made a rush for
+the irregular mass of rock which bore so strong a resemblance to the
+head of some gigantic man.
+
+“That's the one! That's the thing I saw when they were taking me along
+here blindfolded!” exclaimed Mr. Jenks. “I'm sure we're on the right
+trail, now!”
+
+“But what gets me, though,” remarked Mr. Damon, “is why we couldn't see
+that landmark when we were up in the air. We had a fine view, and ought
+to have been able to pick it out with the telescopes.”
+
+The adventurers saw the reason a few seconds later. The image was
+visible only from one place, and that was directly looking up the
+valley. If one went too far to the right or left the head disappeared
+from view behind jutting crags, and it was impossible to see it from
+overhead, because the head was almost under a great spur of a mighty
+mountain.
+
+“We might have hunted for it a week in the airship, and been directly
+over it,” said Tom, “and yet we would never have seen it.”
+
+“Yes, but we never would have gotten here in such good shape if it
+hadn't been for your wonderful craft,” declared Mr. Jenks. “It brought
+us here safely and quickly, and enabled us to elude the men who tried to
+keep us back. We're here in spite of them. If we had traveled by train
+they might have interfered with us in a dozen ways.”
+
+“That's so,” agreed Mr. Damon. “Well, now we're here, what's to be
+done? Which way do we start to reach the cave where the diamonds are
+manufactured, Mr. Jenks?”
+
+“That I can't say. As you know, I only had a momentary glimpse of this
+stone head as they were taking me along the trail. Then one of the men
+noticed that the bandage had slipped and he pulled it into place. So I
+really can't say which direction to take now, in order to discover the
+secret.”
+
+“How long after you saw the head before you reached the cave?” asked
+Tom. “In that way we may be able to tell how far away it is.”
+
+“Well, I should say it was about two or three hours after I saw the
+head, before we got to the halting place, and I was carried into the
+cave. That would make it several miles from here, for we went in a
+wagon.”
+
+“Yes, and they might have driven in a round-about way, in order to
+deceive you,” suggested Mr. Damon. “At best we have but a faint idea
+where the diamond cave is, but we must search for it; eh, Tom?”
+
+“Certainly. We'll start right in. And as the airship will be of but
+little service to us now, I suggest that we leave it in this valley.
+It is very much secluded, and no one will harm it, I think. We can then
+start off prospecting, for I have a large portable tent, and we can
+carry enough food with us, with what game we can shoot, to enable us to
+live. I have a regular camping outfit on board.”
+
+“Fine!” cried Mr. Parker, “and that will give me a chance to make some
+observations among the mountains, and perhaps I can predict when a
+landslide, or an eruption of some dormant volcano, may occur.”
+
+“Bless my stars!” cried Mr. Damon. “I don't wish you any bad luck, Mr.
+Parker, but I sincerely hope nothing of the sort happens! We had enough
+of that on Earthquake Island!”
+
+“One can not halt the forces of nature,” said the scientist, solemnly.
+“There are many towering peaks around here which may contain old
+volcanoes. And I notice the presence of iron ore all about. This must be
+a wonderful place in a thunder and lightning storm.”
+
+“Why?” asked Tom, curiously.
+
+“Because lightning would be powerfully attracted here by the presence
+of the metal. In fact there is evidence that many of the peaks have been
+struck by lightning,” and the scientist showed curious, livid scars on
+the stone faces of the peaks within sight.
+
+“Then this is a good place to stay away from in a storm,” observed Mr.
+Damon. “However, we won't worry about that now. If this is the landmark
+Mr. Jenks was searching for, then we must be in the vicinity of Phantom
+Mountain.”
+
+“I think we are,” declared the diamond seeker. “Probably it is within
+sight now, but there are so many peaks, and this is such a wild and
+desolate part of the country that we may have trouble in locating it.”
+
+“We've got to make a beginning, anyhow,” decided Tom, “and the sooner
+the better. Come, we'll make up our camping kits, and start out.”
+
+It was something to know that they were on the right trail, and it was a
+relief to be able to busy oneself, and not be aimlessly searching for a
+mysterious landmark. They all felt this, and soon the airship was taken
+to a secluded part of the valley, where it was well hidden from sight in
+a grove of trees.
+
+Tom and Mr. Damon then served a good meal, and preparations were made
+to start on their search among the mountains--a search which they hoped
+would lead them to Phantom Mountain, and the cave of the diamond makers.
+
+The tent which would afford them shelter was in sections, and could
+be laced together. They carried food, compressed into small packages,
+coffee, a few cooking utensils; and each one had a gun, Tom carrying a
+combination rifle and shotgun, for game.
+
+“We can't live very high while we're on the trail,” said the young
+inventor, “but it won't be much worse than it was on Earthquake Island.
+Are we all ready?”
+
+“I guess so,” answered Mr. Damon. “How long are we going to be away?”
+
+“Until we find the diamond makers!” declared Tom, firmly.
+
+Shouldering their packs, the adventurers started off. Tom turned for a
+last look at his airship, dimly seen amid the trees. Would he ever come
+back to the Red Cloud? Would she be there when he did return? Would
+their quest be successful? These questions the lad asked himself, as he
+followed his companions along the rocky trail.
+
+“Perhaps we can find the road by which these men go in and out of the
+cave,” suggested Mr. Damon, when they had gone on for several miles.
+
+“I fancy not,” replied Mr. Jenks. “They probably take great pains to
+hide it. I think though, that our best plan will be to go here and
+there, looking for the entrance to the cave. I believe I would remember
+the place.”
+
+“But why can't you follow the directions given by the miner who told you
+about Phantom Mountain?” asked Mr. Damon.
+
+“Because his talk was too indefinite,” answered Mr. Jenks. “He was so
+frightened by seeing what he believed to be a ghost, that he didn't take
+much notice of the location of the place. All he knows is that Phantom
+Mountain is somewhere around here.”
+
+“And we've got to hunt until we find it; is that the idea?” asked Mr.
+Parker.
+
+“Or until we see the phantom,” added Tom, in a low voice.
+
+“Bless my topknot!” exclaimed Mr. Damon. “You don't mean to say you
+expect to see that ghost; do you Tom?”
+
+“Perhaps,” answered the young inventor, and he did not add something
+else of which he was thinking. For Tom had a curious theory regarding
+the phantom.
+
+They tramped about the remainder of that day. Toward evening Tom shot
+some birds, which made a welcome addition to their supper. Then the tent
+was put together, some spruce and hemlock boughs were cut to make a soft
+bed, and on these, while the light of a campfire gleamed in on them, the
+adventurers slept.
+
+Their experience the following day was similar to the first. They saw no
+evidence of a large cave such as Mr. Jenks had described, nor were there
+any traces of men having gone back and forth among the mountains, as
+might have been expected of the diamond makers, for, as Mr. Jenks had
+said, they made frequent journeys to the settlement for food, and other
+supplies.
+
+“Well, I haven't begun to give up yet,” announced Tom, on the third day,
+when their quest was still unsuccessful. “But I think we are making one
+mistake.”
+
+“What is that?” inquired Mr. Jenks.
+
+“I think we should go up higher. In my opinion the cave is near the top
+of some peak; isn't it, Mr. Jenks?”
+
+“I have that impression, though, as you know, I never saw the outside of
+it. Still, it might not be a bad idea to ascend some of these peaks.”
+
+Following this suggestion, they laid their trail more toward the sky,
+and that night found them encamped several thousand feet above the
+sea-level. It was quite cool, and the campfire was a big one about which
+they sat after supper, talking of many things.
+
+Tom did not sleep well that night. He tossed from side to side on the
+bed of boughs, and once or twice got up to replenish the fire, which had
+burned low. His companions were in deep slumber.
+
+“I wonder what time it is?” mused Tom, when he had been up the third
+time to throw wood on the blaze. “Must be near morning.” He looked at
+his watch, and was somewhat startled to see that it was only a little
+after twelve. Somehow it seemed much later.
+
+As he was putting the timepiece back into his pocket the lad looked
+around at the dark and gloomy mountains, amid which they were encamped.
+As his gaze wandered toward the peak of the one on the side of which the
+tent was pitched, he gave a start of surprise.
+
+For, coming down a place where, that afternoon, Tom had noticed a sort
+of indefinite trail was a figure in white. A tall, waving figure, which
+swayed this way and that--a figure which halted and then came on again.
+
+“I wonder--I wonder if that can be a wisp of fog?” mused the young
+inventor. He rubbed his eyes, thinking it might be a swirling of the
+night mist or a defect of vision. Then, as he saw more plainly, he
+noticed the thing in white rushing toward him.
+
+“It's the phantom--the phantom!” cried Tom, aloud. “It's the thing the
+miner saw! We're on Phantom Mountain now!”
+
+
+
+
+CHAPTER XIV--WARNED BACK
+
+
+Tom's cries awakened the sleepers in the tent. Mr. Damon was the first
+to rush out.
+
+“Bless my nightcap, Tom!” he cried. “What is it? What has happened? Are
+we attacked by a mountain lion?”
+
+For answer the young inventor pointed up the mountain, to where, in the
+dim light from a crescent moon, there stood boldly revealed, the figure
+in white.
+
+“Bless--bless my very existence!” cried the odd man. “What is it, Tom?”
+
+“The phantom,” was the quiet answer. “Watch it, and see what it does.”
+
+By this time Mr. Jenks and Mr. Parker had joined Tom and Mr. Damon.
+The four diamond seekers stood gazing at the apparition. And, as they
+looked, the thing in white, seemingly too tall for any human being, slid
+slowly forward, with a gliding motion. Then it raised its long, white
+arms, and waved them threateningly at the adventurers.
+
+“It's motioning us to go back,” said Mr. Parker in an awed whisper. “It
+doesn't want us to go any farther.”
+
+“Very likely,” agreed Tom, coolly. “But we're not going to be frightened
+by anything like that; are we?”
+
+“Not much!” exclaimed Mr. Jenks. “I expected this. A ghost can't drive
+me back from getting my rights from those scoundrels!”
+
+“Suppose it uses a revolver to back up its demand?” asked the scientist.
+
+“Wait until it does,” answered Mr. Jenks. But the figure in white
+evidently had no such intentions. It came on a little distance
+farther, still waving the long arms threateningly, and then it suddenly
+disappeared, seeming to dissolve in the misty shadows of the night.
+
+“Bless my suspenders!” cried Mr. Damon. “That's a very strange
+proceeding! Very strange! What do you make of it, Tom?”
+
+“It is evidently some man dressed up in a sheet,” declared Mr. Jenks. “I
+expected as much.”
+
+“The work of those diamond makers; do you think?” continued Mr. Damon.
+
+“I believe so,” answered Tom, slowly, for he was trying to think it out.
+“I believe they are the cause of the phantom, though I don't know that
+it's a man dressed in a sheet.”
+
+“Why isn't it?” demanded Mr. Jenks.
+
+“Because it was too tall for a man, unless he's a giant.”
+
+“He may have been on stilts,” suggested Mr. Parker.
+
+“No man on stilts could walk along that way,” declared Tom, confidently.
+“He glided along too easily. I am inclined to think it may be some sort
+of a light.”
+
+“A light?” queried Mr. Damon.
+
+“Yes, the diamond makers may be hidden in some small cave near here, and
+they may have some sort of a magic lantern or a similar arrangement, for
+throwing a shadow picture. They could arrange it to move as they liked,
+and could cause it to disappear at will. That, I think, is the ghost we
+have just seen.”
+
+“But the diamond makers have only been in this mountain recently,”
+ objected Mr. Jenks, “and the phantom was here before them. In fact, that
+was what gave the place its name.”
+
+“That may be,” admitted the lad. “There are many places that have the
+name of being haunted, but no one ever sees the ghost. It is always some
+one else, who has heard of some one who has seen it. That may have been
+the case here. I grant that this place may have been called 'Phantom
+Mountain' for a number of years, due to the superstitious tales of
+miners. The diamond makers came along, found the conditions just right
+for their work, and adopted the ghost, so to speak. As there wasn't any
+real spirit they made one, and they use it to scare people away. I think
+that's what we've just seen, though I may be wrong in my theory as to
+what the phantom is.”
+
+“Well, it's gone now, at any rate,” said Mr. Jenks, “and I think we'd
+better get back inside the tent. It's cold out here.”
+
+“Aren't some of us going to stand guard?” demanded Mr. Damon.
+
+“What for?” asked Mr. Jenks.
+
+“Why--er--bless my key-ring! Suppose that ghost takes a notion to come
+down here, and use his gun, as he did on the miners?”
+
+“I don't believe that will happen,” remarked Tom. “The diamond makers,
+if the white thing had anything to do with them, have given us a
+warning, and I think they'll at least wait until morning to see how we
+heed it.”
+
+“We aren't going to heed it!” burst out Mr. Jenks. “I'm going to go
+right ahead and find that cave where they make diamonds!”
+
+“And we're with you!” exclaimed Tom. “We'll have a good fire going the
+rest of the night, and that may keep intruders away. In the morning
+we'll begin our search, and we'll go up the trail where we saw the white
+figure.”
+
+A big pile of wood had been collected for the fire, and Tom now piled
+some logs and branches on the blaze. It would last for some time now,
+and the adventurers, still talking of the “ghost” went back into the
+tent. It was over an hour before they all got to sleep again, and Mr.
+Jenks and Mr. Damon took turns in getting up once or twice during the
+remainder of the night to replenish the fire.
+
+Morning dawned without anything further having occurred to disturb them,
+and, after a hearty breakfast, to which Tom added some fish he caught in
+a nearby mountain stream, they set off up the trail on Phantom Mountain.
+
+They had left their tent standing, as they proposed making that spot
+their headquarters until they located the cave they were seeking. What
+their course would be after that would depend on the circumstances.
+
+If they had expected to have an easy task locating the cavern in which
+Mr. Jenks had seen diamonds made, the adventurers were disappointed. All
+that day they tramped up and down the mountain, looking for some secret
+entrance, but none was disclosed. The higher they went up the great
+peak, the fainter became the trail, until, at length it vanished
+completely.
+
+But this was not to be wondered at, since it was on solid rock, in which
+no footsteps would leave an impression.
+
+“They never brought you up here in a wagon, Mr. Jenks,” decided Tom,
+when he saw how steep the place was.
+
+“I'm inclined to think so myself,” admitted the diamond man. “They must
+have reached the cave from some other way. As a matter of fact, I walked
+some distance after getting out of the vehicle, before we got to the
+cavern. But, even at that, I don't believe we came this way.”
+
+“Yet the phantom was here,” persisted Tom, “and I'm convinced that the
+cave is in this neighborhood. It's up to us to find it!”
+
+But they searched the remainder of that day in vain, and as night was
+coming on, they made their way back to the camp. As Tom, who was in
+the lead, approached the tent, he saw something black fastened to the
+entrance.
+
+“Hello!” he cried. “Some one's been here. That wasn't on the tent when
+we left this morning.”
+
+“What is it?” asked Mr. Damon.
+
+“A black piece of paper, written on with white ink,” replied the lad. He
+was reading it, and, as he perused it a look of surprise came over his
+face.
+
+“Listen to this!” called Tom. “It's evidently from the diamond makers.”
+
+Holding up the black paper, on which the white writing stood out in bold
+relief Tom read aloud:
+
+
+“Be warned in time! Go back before it is too late! You are near to
+death! Go back!”
+
+
+“Bless my shoelaces!” cried Mr. Damon. “This is getting serious.”
+
+
+
+
+CHAPTER XV--THE LANDSLIDE
+
+
+Gathered about the young inventor, the three men looked at the warning.
+The writing was poor, and it was evident that an attempt had been made
+to disguise it. But there was no misspelling of words, and there were no
+rudely drawn daggers, or bloody hands or anything of that sort. In fact,
+it was a very business-like sort of warning.
+
+“Rather odd,” commented Mr. Jenks. “Black paper and white ink.”
+
+“White ink is easy enough to make,” stated Mr. Parker. “I fancy they
+wanted it as conspicuous as possible.”
+
+“Yes,” agreed Tom, “and this warning, together with the antics of the
+thing in white last night, shows that they are aware of our presence
+here, and perhaps know who we are. We will have to be on our guard.”
+
+“Do you think that fellow Munson, whom we left in the forest, could have
+gotten here and warned them?” asked Mr. Damon.
+
+“It's possible,” admitted Tom, “but now let's see if the person who
+pinned this warning on our tent took any of our things.”
+
+A hasty examination, however, showed that nothing had been disturbed,
+and Tom and Mr. Damon were soon getting supper ready, everyone talking,
+during the progress of the meal, about the events of the day, and the
+rather weird culmination of it.
+
+“Well, we haven't had a great deal of success--so far,” admitted Tom, as
+they sat about the fire, in the fast gathering dusk. “I think, perhaps,
+we'd better try on the other side of the mountain to-morrow. We've
+explored this side pretty thoroughly.”
+
+“Good idea,” commented Mr. Jenks. “We'll do it, and move our camp. I
+only hope those fellows don't find our airship and destroy it. We'll
+have a hard time getting back to civilization again, if we have to walk
+all the way.”
+
+This contingency caused Tom some uneasiness. He did not like to think
+that the unscrupulous men might damage the Red Cloud, that had been
+built only after hard labor. But he knew he could accomplish nothing by
+worrying, and he tried to dismiss the matter from his mind.
+
+They rather expected to see the thing in white again that night, but it
+did not appear, and morning came without anything having disturbed their
+heavy sleep, for they were tired from the day's tramp.
+
+It took them the greater part of the day to make a circuit of the base
+of Phantom Mountain in order to get to a place where a sort of trail led
+upward.
+
+“It's too late to do anything to-night,” decided Tom, as they set up the
+tent. “We'll rest, and start the first thing in the morning.”
+
+“And the ghost isn't likely to find us here,” added Mr. Damon. “Where
+are you going, Mr. Parker?” he asked, as he saw the scientist tramping a
+little way up the side of the mountain.
+
+“I am going to make some observations,” was the answer, and no one paid
+any more attention to him for some time. Supper was nearly ready when
+Mr. Parker returned. His face wore a rather serious air, and Mr. Damon,
+noting it, asked laughingly:
+
+“Well, did you discover any volcanoes, that may erupt during the night,
+and scare us to death?”
+
+“No,” replied Mr. Parker, calmly, “but there is every indication that we
+will soon have a terrific electrical storm. From a high peak I caught a
+glimpse of one working this way across the mountains.”
+
+“Then we'd better fasten the tent well down,” called Tom. “We don't want
+it to blow away.”
+
+“There will not be much danger from wind,” was Mr. Parker's opinion.
+
+“From what then?” asked Mr. Jenks.
+
+“From the discharges of lightning among these mountain peaks, which
+contain so much iron ore. We will be in grave danger.”
+
+The fact that the scientist had not always made correct predictions was
+not now considered by his hearers, and Tom and the two men gazed at Mr.
+Parker in some alarm.
+
+“Is there anything we can do to avoid it?” asked Mr. Jenks.
+
+“The only thing to do would be to leave the mountain,” was the answer,
+“and, as the iron ore extends for miles, we can not get out of the
+danger zone before the storm will reach us. It will be here in less than
+half an hour.”
+
+“Then we'd better have supper,” remarked Tom, practically, “and get
+ready for it. Perhaps it may not be as bad as Mr. Parker fears.”
+
+“It will be bad enough,” declared the gloomy scientist, and he seemed to
+find pleasure in his announcement.
+
+The meal was soon over, and Tom busied himself in looking to the guy
+ropes of the tent, for he feared lest there might be wind with the
+storm. That it was coming was evident, for now low mutterings of thunder
+could be heard off toward the west.
+
+Black clouds rapidly obscured the heavens, and the sound of thunder
+increased. Fitful flashes of lightning could be seen forking across the
+sky in jagged chains of purple light.
+
+“It's going to be a heavy storm,” Tom admitted to himself. “I hope
+lightning doesn't strike around here.”
+
+The storm came on rapidly, but there was a curious quietness in the air
+that was more alarming than if a wind had blown. The campfire burned
+steadily, and there was a certain oppressiveness in the atmosphere.
+
+It was now quite dark, save when the fitful lightning flashes came,
+and they illuminated the scene brilliantly for a few seconds. Then, by
+contrast, it was blacker than ever.
+
+Suddenly, as Tom was gazing up toward the peak of Phantom Mountain, he
+saw something that caused him to cry out in alarm. He pointed upward,
+and whispered hoarsely:
+
+“The ghost again! There's our friend in white!”
+
+The others looked, and saw the same weird figure that had menaced them
+when they were encamped on the other side of the peak.
+
+“They must have followed us,” said Mr. Jenks, in a low voice.
+
+Slowly the figure advanced, It waved the long white arms, as if in
+warning. At times it would be only dimly visible in the blackness, then,
+suddenly it would stand out in bold relief as a great flash of fire
+split the clouds.
+
+The thunder, meanwhile, had been growing louder and sharper, indicating
+the nearer approach of the storm. Each lightning flash was followed in a
+second or two, by a terrific clap. Still there was no wind nor rain, and
+the campfire burned steadily.
+
+All at once there was a crash as if the very mountain had split asunder,
+and the adventurers saw a great ball of purple-bluish fire shoot down,
+as if from some cloud, and strike against the side of the crag, not a
+hundred feet from where stood the ghostly figure in white.
+
+“That was a bad one,” cried Mr. Damon, shouting so as to be heard above
+the echoes of the thunderclap.
+
+Almost as he spoke there came another explosion, even louder than the
+one preceding. A great ball of fire, pear shaped, leaped for the same
+spot in the mountain.
+
+“There's a mass of iron ore there!” yelled Mr. Parker. “The lightning is
+attracted to it!”
+
+His voice was swallowed up in the terrific crash that followed, and,
+as there came another flash of the celestial fire, the figure in
+white could be seen hurrying back up the mountain trail. Evidently the
+electrical storm, with lightning bolts discharging so close, was too
+much for the “ghost.”
+
+In another instant it looked as if the whole place about where the
+diamond seekers stood, was a mass of fire. Great forked tongues of
+lightning leaped from the clouds, and seemed to lick the ground. There
+was a rattle and bang of thunder, like the firing of a battery of guns.
+Tom and the others felt themselves tingling all over, as if they had
+hold of an electrical battery, and there was a strong smell of sulphur
+in the air.
+
+“We are in the midst of the storm!” cried Mr. Parker. “We are standing
+on a mass of iron ore! Any minute may be our last!”
+
+But fate had not intended the adventurers for death by lightning. Almost
+as suddenly as it had begun, the discharge of the tongues of fire ceased
+in the immediate vicinity of our friends. They stood still--awed--not
+knowing what to do.
+
+Then, once more, came a terrific clap! A great mass of fire, like some
+red-hot ingot from a foundry, was hurled through the air, straight at
+the face of the mountain, and at the spot where the figure in white had
+stood but a few minutes before.
+
+Instantly the earth trembled, as it had at Earthquake Island, but it was
+not the same. It was over in a few seconds. Then, as the diamond seekers
+looked, they saw in the glare of a score of lightning flashes that
+followed the one great clap, the whole side of the mountain slip away,
+and go crashing into the valley below.
+
+“A landslide!” cried Mr. Parker. “That is the landslide which I
+predicted! The lightning bolt has split Phantom Mountain!”
+
+
+
+
+CHAPTER XVI--THE VAST CAVERN
+
+
+For a time the roiling, slipping, sliding and tumbling of the mass of
+earth and stones, down the side of the mountain, effectually drowned
+all other sounds. Even the thunder was stilled, and though Tom and his
+companions called to one another in terror, their voices could not rise
+above that terrific tumult.
+
+Finally, when they found that the direction of the slide was away from
+their tent, and that they were not likely to be engulfed, they grew more
+calm.
+
+Gradually the noise subsided. The great boulders had rolled to the
+bottom of the valley, and now only a mass of earth and stones was
+sliding down. Even this stopped in about five minutes, and, as though
+satisfied with what it had done, the electrical storm passed. Not a drop
+of rain had fallen.
+
+“Bless my shirt studs!” exclaimed Mr. Damon, who was the first to speak
+after the din had quieted. “Bless my soul! But that was awful!”
+
+“It was just what I expected,” said Mr. Parker, calmly. “I knew, from
+my observations, that we were in a region where landslides and terrific
+electrical storms may be expected at any time. I fully looked for this.”
+
+“Well,” remarked Mr. Jenks, rather sarcastically, “I hope it came up to
+your expectations, Mr. Parker.”
+
+“Oh, fully,” was the answer, “though I wish it could have happened
+in daylight, so that I could better have observed certain phenomena
+regarding the landslide. They are very interesting.”
+
+“At a distance,” admitted Tom, with a laugh of relief. “Well, I'm glad
+it's over, though we'll have to wait until morning to see what damage
+has been done. Lucky we weren't struck by lightning. I never saw such
+bolts!”
+
+“Me, either!” declared Mr. Damon. “This mountain seems to attract them.”
+
+“It is like a magnet,” said Mr. Parker. “I think I shall be able to make
+some fine observations here.”
+
+“If we live through it,” murmured Mr. Jenks.
+
+They watched the play of lightning about a distant bank of clouds,
+but the storm was now far away, only a faint rumbling of thunder being
+heard.
+
+“I'm wondering what happened to the phantom,” said Tom, after a pause.
+“Seems to me he was right in that track of the storm.”
+
+“Do you think it was a 'he'?” asked Mr. Jenks.
+
+“I think we'll find that it's some sort of a man,” answered the young
+inventor. “We may find out very soon, now. I've changed my theory about
+the ghost being reflections of light.”
+
+“How's that?” Mr. Damon wanted to know.
+
+“Well, I think we are on the side of Phantom Mountain where the diamond
+cave is,” went on the lad. “The fact that the phantom appeared here,
+soon after we arrived, shows that the men kept close track of our
+movements. It also shows, I think, that the phantom did not have to
+travel far to be on the spot, whereas we had to make quite a trip to get
+around the base of the mountain. I think the cave is up there,” and
+Tom pointed toward the spot where the weird figure had been last seen,
+before the storm drove it back.
+
+“There may be two phantoms,” suggested Mr. Jenks. “They may keep one on
+this side of the mountain, and one on the other, to warn intruders away.
+
+“It's possible,” admitted Tom. “Well, we'll see how things look in the
+morning, when we'll take up our march again, and go up the mountain.
+We'll reach the top, if possible, which we couldn't do from the other
+side, as it was too steep.”
+
+“I hope we shall be able to go forward in the morning,” came from Mr.
+Jenks.
+
+“What do you mean?” asked the lad, struck by a peculiar significance in
+the diamond man's tones.
+
+“Why, that landslide may have opened a great gully in the side of
+Phantom Mountain, which will prevent us from passing. It was a terrific
+lot of earth and stones that slid away,” answered Mr. Jenks.
+
+“It certainly was,” agreed Mr. Parker. “I would not be surprised if
+the mountain was half destroyed, and it may be that the diamond cave no
+longer exists.”
+
+“Not very cheerful, to say the least,” murmured Mr. Jenks to Tom, and,
+as it was getting quite chilly, following the storm, they went inside
+the tent.
+
+Tom could hardly wait for daylight, to get up and see what havoc the
+landslide had wrought. As soon as the first faint flush of dawn showed
+over the eastern peaks, he hurried from the tent. Mr. Damon heard him
+arise, and followed.
+
+A curious scene met their eyes. All about were great rocks rent and torn
+by the awful power of the lightning. The fronts of the stone cliffs
+were scarred and burned by the electrical fire, and fantastic markings,
+grotesque faces, and leering animals seemed to have been drawn by some
+gigantic artist who used a bolt from heaven for his brush.
+
+But the eyes of Tom and Mr. Damon took all this in at a glance, and then
+their gaze went forward to where the avalanche had torn away a great
+part of the mountain.
+
+“Whew! I should say it was a landslide!” cried Tom.
+
+“Bless my wishbone, yes!” agreed Mr. Damon.
+
+Below them, in the valley, lay piled immense masses of earth and stones.
+Boulders were heaped up on boulders, and rocks upon rocks, being tossed
+about in heaps, strung about in long ridges, and swirled about in
+curves, as though some cyclone had toyed with them after the lightning
+flash had tossed them there.
+
+“But the mountain isn't half gone,” said Tom, as his eyes took in what
+was left of the phantom berg. “I guess it will take a few more bolts
+like that one, to put this hill out of business.”
+
+Though the landslide had been a great one, the larger part of the
+mountain still stood. An immense slice had been taken from one side, but
+the summit was untouched.
+
+“And there's where the diamond cave is!” cried Tom, pointing to it.
+
+“I think so myself,” agreed Mr. Jenks, who came from the tent at that
+moment, and joined the lad and Mr. Damon. “I think we shall find the
+cave somewhere up there. We must start for it, as soon as we have eaten,
+and we may reach it by night.”
+
+The three stood gazing up toward the summit of the great mountain.
+Suddenly, as the sun rose higher in the heavens, it sent a shaft of rosy
+light on the face of the berg that had been scarred by the landslide.
+Tom Swift uttered an exclamation, and pointed at something.
+
+“See!” he cried. “Look where the trail is--the trail down which the
+phantom must have come. It is on the edge of a cliff now!”
+
+They looked, and saw that this was so. The increasing light had just
+revealed it to them. When the lightning bolt had torn away a great
+portion of the mountain it had cut sheer down for a great depth and
+when the earth and stones fell away they left a narrow pathway, winding
+around the mountain, but so near the edge of a great chasm, that there
+was room but for one person at a time to walk on that footway. The
+uncertain trail up Phantom Mountain had all but been destroyed.
+
+“The way up to the peak is by that path, now,” spoke Tom, in a low
+voice.
+
+“Bless my soul!” cried Mr. Damon. “It's as much as a man's life is worth
+to attempt it. If he got dizzy, he'd topple over, and fall a thousand
+feet. Dare we risk it?”
+
+“It's the only way to get up,” went on Tom. “It's either that way, or
+not at all. We've tried the other side without success. We must go up
+this way--or turn back.”
+
+“Then we'll go up!” cried Mr. Jenks. “It may not be as dangerous as it
+looks from here.”
+
+But it was even more dangerous than it appeared, when they went part way
+up it after a hasty breakfast. The trail was a mere ledge of rock now,
+and in some places, to get around a projecting edge of the mountain,
+they had to stand with their backs to the dizzy depths at their feet,
+and with both arms outstretched work their way around to where the trail
+was wider.
+
+“Shall we risk it?” asked Tom, when they had tried the way, and found
+it so dangerous. “We can't take anything with us--even our guns, for
+we couldn't carry them, and if we reach the mouth of the cave, and find
+those men there--”
+
+He paused significantly. The adventurers looked at one another. The
+search for the diamond makers was becoming more and more dangerous.
+
+“I say let's go on!” decided Mr. Damon, suddenly. “We want to locate
+that cave, first of all. Perhaps, when we do find it, we may see some
+easier way of getting to it than this. And if those diamond makers do
+attack us--well, I don't believe they'll shoot defenseless men, and they
+may listen to reason, and give Mr. Jenks his rights--tell him how to
+make diamonds in return for the money he gave them.”
+
+“I don't believe those scoundrels will listen to reason,” replied the
+diamond man, “but I agree with Mr. Damon that we ought to go on. We may
+find some other means of reaching the cave--if we can discover it, and
+we'll take a chance with the men.”
+
+“Forward it is, then!” cried Tom. “I have a revolver, and I can supply
+one of you gentlemen with another. They may come in useful in an
+emergency. Let's go back to camp, take a little lunch in our pockets,
+and try to scale the mountain.”
+
+They were soon on their way up the dizzy path once more, and, as they
+advanced, they found it growing more and more dangerous. In some places
+they found it almost impossible to get around certain corners, where
+there was barely room for their feet. As Tom remarked grimly, a fat man
+never could have done it. Fortunately they were all comparatively thin,
+for their hard work, and not too abundant food, since they had left the
+airship, had reduced their weight.
+
+Up and up they went, higher and higher, sometimes finding the path wide
+enough for two to walk abreast, and again seeing it narrow almost to
+a ribbon. They hardly dared look down into the chasm at their left--a
+chasm filled, in part, with the rocks and boulders tossed into it by the
+lightning bolt.
+
+Tom was in the lead, and had just made a dangerous turn around a
+shoulder of rock--one of those places where he had to extend both arms,
+and fairly hug the cliff before he could get around.
+
+But, when he had made it, and found himself on a broad pathway, cut
+in the living rock, he gave a great shout--a shout that caused his
+companions to hasten to his side. They found the young inventor pointing
+to a clump of bushes and small trees.
+
+But it was not the shrubbery that Tom desired to call to their
+attention. They saw that in an instant, for, dimly seen through the
+leaves, was something black, and, as they looked more closely, they saw
+that it was a great hole in the side of the mountain--a vast cavern,
+opening like a tunnel.
+
+“The cave! The cave!” cried Tom. “The diamond makers' cave!”
+
+Hardly had he spoken than two men, each one carrying a gun, showed
+themselves in the mouth of the cavern, and, instant later they both ran
+toward the little party of adventurers.
+
+
+
+
+CHAPTER XVII--THE PHANTOM CAPTURED
+
+
+Surprise held Tom and his friends almost spellbound for the moment.
+The young inventor's hand went toward the pocket where he carried his
+revolver. Mr. Jenks, who had the only other weapon, sought to draw it,
+but he was stopped by a gesture of one of the two men with guns.
+
+“Hold on, strangers!” the man cried. “I know what you're up to! Better
+not try to draw anything--it might not be healthy. Now, then, who are
+you, and what do you want?”
+
+The question came rather as a surprise, at least to Tom and Mr. Jenks.
+They had taken it for granted that these men--if they were the diamond
+makers--would know Mr. Jenks, and guess at his errand in coming back
+to Phantom Mountain. But, it seemed, that they took them all for casual
+strangers.
+
+No one answered for a moment. Tom caught the eye of Mr. Jenks, and there
+was a look of hope in it. If ever there was a time for strategy, it was
+now. Evidently Munson, the stowaway on the airship, had not yet been
+able to send a warning to his confederates. And neither of the two men
+recognized Mr. Jenks as the man who had been defrauded of his rights.
+It might be possible to conceal the real object of the adventurers until
+they had time to formulate a plan of action.
+
+“Well,” exclaimed the man with the gun, impatiently, “I ask you folks a
+question. What do you want?”
+
+Fortunately, neither Mr. Damon nor Mr. Parker replied. The former
+because he deferred to Tom and Mr. Jenks, and the scientist because he
+was busy inspecting some curious rocks he picked up. As it turned out
+this was the luckiest thing he could have done. It lent color to what
+Mr. Jenks said a moment later.
+
+“What are you doing up here?” demanded the man again. “Don't you know
+this is private property?”
+
+“We--we were just looking around,” answered Mr. Jenks, which was true
+enough; as far as it went.
+
+“Prospecting,” added Tom.
+
+“After gold?” demanded the second man, suspiciously.
+
+“We'd be glad to find some,” retorted the lad. At that moment Mr. Parker
+began breaking off bits of rock with a small geologist's hammer which he
+carried. The men with the guns looked at him.
+
+“So you think you'll find gold up here?” asked the one who had first
+spoken.
+
+“Is there any?” inquired Tom, trying to make his voice sound eager.
+
+“Nary a bit, strangers,” was the answer, and the two men laughed
+heartily. “Now, we don't want to seem harsh,” went on the man who seemed
+to be the spokesman, “but you'd better get away from here. This is
+private ground, and dangerous too--how'd you ever get up the trail--we
+heard it was destroyed.”
+
+“There is still a narrow path,” said Mr. Jenks. “We came up that--the
+lightning and landslide haven't left much of it, though.”
+
+Mr. Parker looked quickly up from the rocks at which he was tapping with
+his small hammer. “You have terrific lightning up here,” he said. “I am
+much interested in it, from a scientific standpoint. I predict that some
+day the entire mountain will be destroyed by a blast from the sky.”
+
+“I hope it won't be right away,” spoke one of the men. “Now I guess you
+folks had better be leaving while there's a path left to go down by.”
+
+“Might I ask,” broke in Mr. Parker, as calmly as though he was lecturing
+to a class of students, “might I ask if you have noticed any peculiar
+effect of the lightning up here on the summit of the mountain? Does it
+fuse and melt rocks, so to speak?”
+
+“What's that?” cried the spokesman, with a sudden flash of anger. The
+two men looked at each other.
+
+“I wanted to know, merely for scientific reasons, whether the lightning
+up here ever melted rocks?” repeated Mr. Jenks.
+
+“Well, whether it's for scientific reasons or for any other, I'm not
+going to answer you!” snapped the man. “It's none of your affair what
+the lightning does up here. Now you'd all better 'vamoose'--clear out!”
+
+“All right--we'll go,” said Tom, quickly, at the same time motioning to
+Mr. Jenks to agree with him. The eyes of the young inventor were
+roving about. He saw what looked like a second trail, leading down the
+mountain, from the far side of the cave. He was convinced now that there
+was another way to get to it. Possibly they might find it. At any rate
+nothing more could be done now. They must go back, for the cavern was
+too well guarded to attempt to enter it by force--at least just yet.
+
+“Yes, we'll go back,” assented Mr. Jenks.
+
+Mr. Parker was tapping away at the rocks. He looked toward the black
+mouth of the big cave. On what corresponded to the roof of it, some
+distance back from the entrance, he saw a slender metal rod sticking up
+into the air.
+
+“May I ask if that's a lightning rod?” he inquired innocently. “If
+it is, I should like to ask about its action in a mountain that is so
+impregnated with iron ore.
+
+“You may ask until you get tired!” cried the spokesman, again showing
+unreasoning anger, “but you'll get no answer from us. Now get away from
+here before we do something desperate. You're on private ground and
+you're not wanted. Clear out while you have the chance.”
+
+There was no help for it. Slowly our friends turned and began to go
+down the dangerous trail. They were soon out of sight of the two men who
+stood before the cave, with their guns ready, but neither Tom nor any of
+his companions spoke for some time.
+
+When they had rounded one of the most dangerous turns the young inventor
+sat down to rest, an example followed by the others.
+
+“Well,” asked Tom, “do you think those are some of the diamond makers,
+Mr. Jenks?”
+
+“I certainly do, though I never saw those two men before. If I could
+once get inside the cave, I could tell whether or not it was the one
+where I was practically held a prisoner. But I'm sure it is. I know some
+of the men used to go off every day with guns, and not come back until
+night. I have no doubt they were on guard, just as these two are. And,
+also, I think I heard them speak of a second entrance to the cavern. The
+one we just saw may not be the main one, through which I was taken.”
+
+“I believe we are on the right track,” ventured Mr. Damon, “but we will
+either have to go up there after dark, which will be risky, on account
+of the narrow trail, or else we will have to find some other path.”
+
+“The last would be better,” spoke Tom.
+
+“That rod of metal sticking up on top of the cave interested me,” said
+the scientist. “Did you hear anything of that when you were here before,
+Mr. Jenks?”
+
+“No. Probably that is only a lightning rod, or it may be a staff for a
+signal flag. But what surprises me is that those men didn't suspect
+that we were seeking to discover their secret. They took us for ordinary
+prospectors.”
+
+“So much the better,” remarked Tom. “We have a chance now of getting
+inside that cave. But we will have to go back to camp, and make other
+plans. And we must hurry, or it will be dark before we get there.”
+
+They hastened their steps, pausing only briefly to eat some of the lunch
+they had brought along, and to drink from a spring that bubbled from the
+side of the mountain. It was getting dusk when they got back to their
+tent. They found nothing disturbed.
+
+“I wonder if we'll see that phantom again to-night?” ventured Tom, as
+they were sitting about the campfire a little later.
+
+“Probably not,” remarked Mr. Jenks. “I don't believe the ghost will
+venture down the dangerous trail after dark, and the gang may think
+that the warning given us by the two men on guard at the cave will be
+sufficient. But if we don't leave here by to-morrow I think we will have
+another visit from the thing in white.”
+
+It was about an hour after this when Tom was collecting some wood in a
+pile nearer the fire, so as to have it ready to throw on, in case there
+was any alarm in the night, that he happened to look up toward the
+summit of the mountain. A slight noise, as of loose stones rolling down,
+attracted his attention, and, at first, he feared lest another landslide
+was beginning, but a moment later he saw what caused it.
+
+There, advancing down the steep and dangerous trail was the figure
+in white--the phantom. Instantly a daring plan came into Tom's head.
+Dropping the wood softly, he moved back out of the glare of the fire.
+
+“Mr. Jenks!” he called in a whisper.
+
+The diamond man, who was behind the tent, came toward Tom.
+
+“What is it?” he asked. Then, as he saw the ghostly visitor, he added:
+“Oh--the phantom again! What's it up to?”
+
+“The same thing,” replied Tom, “but it won't do it long, if my plan
+succeeds.”
+
+“What plan is that, Tom?”
+
+“I'm going to try to capture that--that man--or whatever it is. Will you
+help?”
+
+“Surely!”
+
+“Then let's work around behind it, while Mr. Damon and Mr. Parker come
+up from in front. We'll solve this part of the mystery, anyhow, if it's
+possible!”
+
+The two other men were soon told of the plan. Meanwhile the thing in
+white had advanced slowly, until within a few hundred feet of the camp.
+They could see now that it was no shaft of light, but some white body,
+shaped like a tall, thin man, draped in a white garment. The long arms
+waved to and fro. There was no semblance of a head.
+
+“You and Mr. Parker go right toward it, slowly, Mr. Damon,” advised
+Tom. “Mr. Jenks and I will make a circle, and get in back. Then, if it's
+anything alive we'll have it.”
+
+The “ghost” continued to advance. Tom and the diamond man stole off to
+one side, their buckskin moccasins making no sound. Mr. Damon and the
+scientist went boldly forward.
+
+This movement appeared to disconcert the spirit. It halted, waved the
+arms with greater vigor than before, and seemed to indicate to the
+adventurers that it was dangerous to advance. But Mr. Damon and Mr.
+Parker kept on. They wanted to give Tom and Mr. Jenks time enough to
+make the circuit.
+
+Suddenly the stillness of the night was broken by a low whistle. It was
+Tom's signal that he and Mr. Jenks were ready.
+
+“Come on! Run!” cried Mr. Damon.
+
+The scientist and the eccentric man leaped forward.
+
+The “ghost” heard the whistle, and heard the spoken words. The thing in
+white hesitated a moment, and then raised one arm. There was a flash of
+fire, and a loud report.
+
+“He's firing in the air!” cried Tom. “Come on, we have him now!”
+
+Undaunted by the display of firearms, Mr. Damon and Mr. Parker kept on.
+They could hear Tom and Mr. Jenks running up in back of the figure.
+The latter also heard this, and suddenly turned. Caught between the two
+forces of our friends, the “ghost” was at a loss what to do.
+
+The next instant Tom, who had distanced Mr. Jenks, made a flying tackle
+for the figure in white, and caught it around the legs. Very substantial
+legs they were, too, Tom felt--the legs of a man.
+
+“Wow!” yelled the “ghost,” as he went down in a heap, the revolver
+falling from his hand.
+
+“Come on!” cried Tom. “I have him!”
+
+His friends rushed to his aid. There was a confused mass of dark bodies,
+arms and legs mingled with something tall and thin, all in white.
+Suddenly the moon came from behind a cloud and they could see what they
+had captured--for captured the phantom was.
+
+It proved to be a rather small man, who wore upon his shoulders a
+framework of wood, over which some white cloth was draped. It had fallen
+off him when Tom made that tackle.
+
+“Well,” remarked the young inventor, as he sat on the struggling man's
+chest. “I guess we've got you.”
+
+“I rather guess you have, stranger,” was the cool reply.
+
+
+
+
+CHAPTER XVIII--BILL RENSHAW WILL HELP
+
+
+They were all panting from the exertion of the run up the mountain and
+the contest with the phantom--a phantom no longer--though, truth to
+tell, the struggle was not nearly so fierce as Tom had expected. He
+thought the “ghost” would put up a stiff fight.
+
+“Got any ropes to tie him with?” asked Mr. Damon, who was helping Tom
+hold the man down.
+
+“Ropes? You aren't going to tie me up are you, strangers?” asked the
+captive.
+
+“That's what we are!” exclaimed Mr. Jenks. “We've had trouble enough in
+this matter, and if I've got one of the gang, perhaps I can get some of
+the others, and have my rights. So tie him up, Tom, and we'll take him
+to camp.
+
+“Oh, you needn't go to all that trouble, strangers,” went on the man,
+calmly. “If one of you will get off my chest, and the other gentleman
+ease up on my stomach a bit, I'll walk wherever you want me, and not
+make any trouble. I haven't got a gun.”
+
+“Bless my gloves! But you're a cool one,” commented Mr. Damon, as he
+complied with the man's request, and got up from his stomach. “But look
+out for him, Tom. He had a gun, for he fired it in the air.”
+
+“He hasn't it now,” answered the young inventor. “I knocked it from his
+hand when I leaped for him.”
+
+“That's what you did,” assented the man, as he got up, while Tom kept a
+tight hold of him, as did Mr. Jenks. “What kind of a grizzly bear hug do
+you call that, anyhow, that you gave me?”
+
+“That was a football tackle,” explained Tom.
+
+“I allers heard that was a dangerous game!” remarked the former phantom
+simply. “Well, now you've got me, what are you going to do with me?”
+
+“Take you where we can have a good look at you,” replied Mr. Jenks, as
+he kicked aside the wooden framework, and the sheet which had made the
+“ghost” appear so tall. “So this is how you worked it; eh?”
+
+“Yep. That was the 'haunt' stranger. I made it myself, and it worked all
+right until you folks come along. I rather suspicioned from the first,
+when I played the trick over on 'tother side of the mountain, that you
+wouldn't be so easy to fool as most prospectors are.”
+
+“Oh, so you're the only ghost then?” asked Tom.
+
+“I'm the only one.”
+
+By this time they had reached the camp. Tom threw some light logs on the
+fire, which blazed up brightly. As the flames illuminated the face of
+their captive, Mr. Jenks looked at him, and cried out:
+
+“Why it's Bill Renshaw!”
+
+“That's me,” admitted the man who had played the part of the phantom,
+“and thunder-turtles! if it ain't Mr. Jenks who was once in the diamond
+cave with us. Whatever happened to you? I never heard. The others said
+you got tired and went away.”
+
+“They took me away--defrauded me of my rights!” declared Mr. Jenks,
+bitterly. “But I'll get them back! To think of Bill Renshaw playing the
+part of a ghost!”
+
+“They made me do it,” went on the man, somewhat dejectedly. “I wanted to
+be at work in the cave, but they wouldn't let me.”
+
+“Is this man one of the diamond makers?” asked Tom, in great surprise.
+
+“He is--one of the helpers, though I don't believe he knows the secret
+of making the gems,” explained Mr. Jenks. “He was one of the men in the
+cave when I was there before, and he and I struck up quite a friendship;
+didn't we, Renshaw?”
+
+“That's what, and there ain't no reason why we can't be friends now;
+that is unless you hold a grudge against me for firing at you. But I
+only shot in the air, to scare you away. Them's my instructions. I'm
+supposed to be on guard, and scare away strangers. I'm tired of the
+work, too, for I don't get my share, and those other fellows, in the
+cave, get all the money from the diamonds.”
+
+Tom Swift uttered an exclamation. A sudden plan had come to him. Quickly
+he whispered to Mr. Jenks:
+
+“Make a friend of this man if possible. He evidently is dissatisfied.
+Offer him a sum to show us another way into the cave, and we may yet
+discover the secret of the diamond makers.”
+
+“I will,” declared Mr. Jenks, quietly. Then, turning to Renshaw, he
+added:
+
+“Bill, come over here. I want to have a talk with you. Perhaps it will
+be to our mutual advantage.”
+
+He led the former phantom to one side, and for some time conversed
+earnestly with him. Mr. Jenks told the story of how he had been deceived
+by Folwell and the others who were at the head of the gang of diamond
+makers. The rich man related how they had taken his money, and, after
+promising to disclose the secret process to him, had broken faith, and
+had drugged him, afterward taking him out of the cave.
+
+“I want only my rights, and that for which I paid,” concluded Mr. Jenks.
+“Now, I gather that these men haven't treated you altogether fairly,
+Bill.”
+
+“Indeed they haven't. I helped 'em to the best of my ability, and all
+I get out of it is to stay out on this lonely side of the mountain,
+and play ghost. They owe me money, too, and they won't pay me, either,
+though they have lots, for they sold some diamonds lately.”
+
+“Then they are still making diamonds?” asked Mr. Jenks, eagerly. “Have
+you seen them? Do you know the secret?”
+
+“No, I don't know it, for they won't let me in on it. I'm always sent
+out of the cave just before they make the gems. But I know they've made
+some lately, and have sold 'em. I want my share.”
+
+“Look here!” exclaimed Mr. Jenks, quickly, wishing to strike while the
+iron was hot. “I'll make you a proposition. Show us how to get into that
+cave, unknown to the diamond makers, and I'll pay you twice what they
+agreed to. Is it a bargain?”
+
+Bill Renshaw considered a moment. Then he thrust out his hand, clasped
+that of Mr. Jenks, and exclaimed:
+
+“It is. I'll take you into the cave by an entrance that's seldom used.
+There are four ways to get in. The one where the two men drove you back
+is the rear one. The front one is on the other side of the mountain, but
+it's so well concealed that you'd never find it. But I can take you to
+one where you can get in, and those fellows will never know it. And,
+what's more, I'll help you if it comes to a fight!”
+
+“Good!” exclaimed Mr. Jenks. “I think we'll discover the secret of the
+diamond makers this time,” and he went to tell the others of the success
+of his talk. Bill Renshaw had been converted from an enemy into a
+friend, and the former phantom was now ready to lead Tom and the others
+into the secret cave.
+
+“We'll start in the morning,” decided Mr. Jenks, who, after many
+disappointments, at last saw success ahead of him.
+
+
+
+
+CHAPTER XIX--IN THE SECRET CAVE
+
+
+Tom Swift was up at break of day, and the others were not far behind
+him.
+
+“Now for the secret cave!” cried the young inventor as he gazed up
+the mountain, in the interior of which the mysterious band of men were
+making the diamonds.
+
+“Have you made any plans, Bill?” asked Mr. Jenks of the former phantom,
+who had cast his lot in with the adventurers. “What will be the best
+course for us to follow?”
+
+“You just leave it to me, Mr. Jenks,” was the answer. “I'll get you into
+the cave, and those fellows, who, I believe, are trying to do me out of
+my rights, as they did you out of yours, will never know a thing about
+it.”
+
+“Bless my finger-nails!” cried Mr. Damon. “That will be great! We can
+get in the cave, and watch them make the diamonds at our leisure.”
+
+“They don't make them every day,” explained Renshaw. “It seems they
+have to wait for certain occasions. Mostly they make the diamonds when
+there's a big storm.”
+
+“A big storm,” asked the scientist with a sudden show of interest.
+“Do you mean one of those electrical storms, such as we had the other
+night?”
+
+“That's it, Mr. Parker, though why they wait until there's a storm is
+more than I can tell.”
+
+“Perhaps they know that on such occasions no one will venture up the
+mountain,” spoke Mr. Damon.
+
+“No, it isn't that,” declared the scientist. “I think I am on the
+track of a great scientific discovery, and I will soon be able to make
+observations that will confirm it.”
+
+“Well, I'm going to make an observation right now,” said Tom, with a
+laugh. “I'm going to see what there is for breakfast.”
+
+“And that reminds me,” came from Mr. Jenks, “shall we move our camp,
+Bill, and take the tent with us to the cave?”
+
+“I hardly think so,” was the answer. “I think the best plan would be to
+conceal the tent somewhere around here, in case you might need it again.
+You can also store what food you have left.”
+
+“But, bless my appetite, we don't want to starve in that diamond cave!”
+ objected Mr. Damon.
+
+“I'll see that you don't,” declared Bill Renshaw. “I'll take you in
+there, unbeknownst to those fellows, and I'll provide you with plenty
+of food and water. You see the cave is so big that there are some parts
+they never visit.”
+
+“And we can stay in one of those parts, and eat?” asked Tom.
+
+“Sure,” answered Bill.
+
+“And watch the diamond makers at work?” asked Mr. Jenks.
+
+“That's it,” replied the former phantom.
+
+“Then the sooner we get started the better,” remarked Mr. Damon. Mr.
+Parker said nothing. He appeared to be thinking deeply, and was tapping
+at some rocks with his little hammer.
+
+The advice of Bill Renshaw was followed, and the tent, and what food
+remained, was concealed in the bushes, with rocks piled over to keep
+away prowling animals. Then they started for the secret cave.
+
+The man who played the part of a ghost picked up the framework and white
+cloth that had formed his disguise.
+
+“I'll still have to use this,” he explained, “for I don't want those
+fellows to know that I'm helping you. I'll continue to play the spirit
+of the mountain, but there won't be much need of it. I don't think any
+more people will come prospecting out here.”
+
+“Have you heard of the arrival of Farley Munson?” asked Tom, as he
+related the facts about the stowaway.
+
+“He hadn't arrived up to a day or so ago,” answered Bill. “I guess he's
+still traveling. Farley is one of the heads of the gang,” he added, “and
+a dangerous man.”
+
+As Bill led the way toward the cave, taking a route that the adventurers
+had never suspected led to it, he explained that the cavern was a large
+one, capable of holding an army.
+
+“But there's only a small part of it used by the diamond makers,” he
+added. “They work in a small recess, near the summit of the mountain.
+The little cave, where I'm going to take you, opens off from it by a
+long passage. And, except that you'll be pretty much in the dark, you'll
+be quite comfortable. There are tables, chairs, and some bunks in the
+place. I can get you some lights, and plenty of food.”
+
+“But, if you are seen taking away food, won't the others suspect
+something?” asked Tom.
+
+“I do pretty much as I please,” said Bill. “I go and come when I like.
+All I'm supposed to do is to watch my two sides of the mountain, play
+the ghost, and give warning when any one is coming. Sometimes I leave
+black and white messages, like the one I put on your tent. Those fellows
+fix 'em up for me. I've told 'em about you, though I didn't know who you
+were, and they think you have gone, for the two men on guard at the rear
+entrance so reported. Sometimes I stay out on the mountain for a couple
+of days at a time, when the weather's good, and don't go back to the
+cave. Those times I take food with me, and so if they see me making off
+with some supplies they'll think I'm going to camp out.”
+
+“It doesn't look as though we'd ever get into a cave near the top of the
+mountain, going this way,” said Tom, as they marched along. “We're going
+down, instead of up.”
+
+“That's the secret of this trail,” explained Bill. “We go down in a
+sort of valley, and then go up a pretty stiff place, and then we're on
+a direct trail to the entrance I told you about. It's a steep road to
+climb, but I guess we can manage it.”
+
+And a hard climb the adventurers did find it. The road was almost as bad
+as the one along the edge of the chasm, but they managed to negotiate
+it, and finally found themselves on a fairly good trail.
+
+“We'll soon be there,” Bill assured them. “After you get in the little
+cave, where I'm going to hide you, I'll have to leave you for a spell,
+until I get my ghost rigging fixed up again. But I'll see that you have
+plenty of food and drink.”
+
+A little later their guide came to a sudden halt, and peered around
+anxiously.
+
+“What's the matter?” asked Tom.
+
+“I was just looking to see if any of the men were about,” he answered.
+“But I guess not--it looks all right. The entrance is right here.”
+
+They were on a side of the mountain, near the summit. Below stretched a
+magnificent scene. A great valley lay at their feet, and they could look
+off to many distant peaks. The main trail to Leadville, and the one to
+the settlement of Indian Ridge, was in sight.
+
+Suddenly Tom, who had been using a small but powerful telescope, uttered
+an exclamation, and focussed the instrument on a speck that seemed
+moving along on the trail below.
+
+“A man--coming up the mountain,” cried Tom. “And--it can't be--yet it
+is--it's Farley Munson--the stowaway!” he cried. “He's coming here!”
+
+“Let me look!” begged Mr. Jenks, taking the glass from Tom. An instant
+later the diamond man exclaimed: “Yes, it's Munson!”
+
+“Then in here with you--quick!” cried Renshaw. “He can't see us yet, and
+we'll be out of sight in another minute.”
+
+The former spirit pulled aside some thick bushes, and pointed to a hole
+which was disclosed.
+
+“The entrance to the secret cave,” he announced. “Slip in all of you.”
+
+Tom, after another glance at the man toiling his way up the mountain,
+entered the cavern. He was followed by the others. Bill was the last to
+enter, and he replaced the bushes over the entrance.
+
+“At last!” exclaimed Mr. Jenks, as he gazed up at the roof of the
+dimly-lighted vault in which they found themselves.
+
+“Yes, we're in the diamond makers' secret cave,” added Tom. “Now to
+catch them at work!”
+
+“Come on,” advised Bill, in a low tone, “We're not safe yet,” and he
+produced a lantern from some hidden recess, lighted the wick, and led
+the way. As the others followed they were aware of a subdued noise in
+the great cavern.
+
+
+
+
+CHAPTER XX--MAKING THE DIAMONDS
+
+
+“What's that noise?” asked Tom, as their guide flashed the lantern to
+show them the way.
+
+“That's the men getting ready to make diamonds, I guess,” was the
+answer. “You see it takes quite a while to get the stuff ready. I don't
+know what they use--they never tell me any of their secrets.”
+
+“Oh, I know the ingredients well enough,” said Mr. Jenks, “but I
+don't know the secret of how they apply the terrific heat and pressure
+necessary to fuse the materials into diamonds.”
+
+“Well, you'll soon know,” declared Bill Renshaw. “Of course it isn't
+always successful. I've known 'em to try half a dozen times before they
+got any diamonds big enough to satisfy 'em. They gave me some of the
+small ones when I asked for my wages.
+
+“How did you come to get in with these men?” asked Tom, curious to
+understand how a person seemingly as honest as Renshaw appeared to be
+had cast his lot in with the men who had broken faith with Mr. Jenks.
+
+“Oh, I've lived around these parts all my life,” was the answer. “I knew
+of this cave before these diamond fellers came to it. In fact, I
+showed it to 'em. It was several years ago that a party of men who were
+prospecting around here came to me and asked if I knew of a small cave
+near the top of a high mountain, where lightning storms were frequent.
+I told them about Phantom Mountain, as it was called then, and also of
+this cave. If there's any place where they have worse lightning storms
+than here, I'd like to know it. They scare me, sometimes, like the night
+when that landslide happened, and I'm sort of used to 'em.
+
+“Well, I took these men to the cave, and they hired me as a sort of
+lookout. Then they began their work, and at first I didn't know what
+they were up to, but finally I caught on. Then Mr. Jenks came, and
+disappeared mysteriously, though then I didn't know that they had played
+a trick on him. I was outside most of the time, pretending I was the
+ghost. So that's how I came to get in with 'em, and I wish I was out.”
+
+“You soon will be, I think,” declared Mr. Jenks. “But won't our talking
+be heard by the men?”
+
+“No danger. There is a thick wall between this part of the cave, and the
+part where they live and work. I'll soon have you well hid, and then you
+wait until I come back.”
+
+“What about Munson?” asked Tom. “He is evidently on his way here to tell
+his confederates about us.”
+
+“He won't know what has happened to us,” said Mr. Jenks, “and he won't
+see anything of us. I guess we're safe enough.”
+
+Through the dark passage they followed Bill Renshaw until he came to a
+halt in a place that suddenly widened and broadened into a good-sized
+cave.
+
+“Here's your stopping place,” said the former ghost. “Now if you follow
+that passage, off to the left,” and he pointed to it, “you'll come
+to the larger part of the cave where the diamond makers are. But go
+cautiously, and don't make any noise. I won't be responsible for what
+happens.”
+
+“We'll take all the risk,” interrupted Tom.
+
+“All right. Now there's a couple of lanterns around here. I'll light
+them, and leave you for a while until I can get some grub. I'll be back
+as soon as I can.”
+
+He glided away, after lighting two lanterns, by the gleams of which
+the adventurers could see that they were in a vaulted cavern that had
+evidently been fitted up as a living apartment. The sides, roof and
+floor were of stone. It was clean, and the air was fresh. There were
+some chairs, a table, and several cots, with pieces of bagging for
+bedding, though it was warm in the place.
+
+“I guess we can stay here until we discover the secret,” spoke Tom.
+
+“Bless my watch! We can if we have something to eat,” came from Mr.
+Damon, with something like a sigh. “I'm hungry!”
+
+“And I want to make some observations,” said Mr. Parker. “From what I
+have seen of this mountain, I would not be surprised if this cave was
+to be suddenly destroyed by a landslide or a lightning bolt. I will make
+some further investigations.”
+
+“Well, if it's going to cause you to make such gloomy prophecies as
+that, I'd just as soon you wouldn't look any further,” spoke Tom, in
+a low voice. But Mr. Parker, taking one of the lanterns, set about
+examining the rock of which the cave consisted.
+
+In a short time Bill Renshaw returned with enough food to last for two
+days. He said he was going out on the mountain once more to act the part
+of a lookout, and would visit the adventurers again the next day.
+
+“In the meanwhile you can do just as you please,” he said. “Nobody is
+likely to disturb you here, and you can sneak up and take a look at the
+men in the other cave whenever you're ready. Only be careful--that's all
+I've got to say. They're desperate men.”
+
+It was not very pleasant, eating in the gloomy cavern, but they made the
+best of it. They cooked on a small oil-stove they found in the place,
+and after some hot coffee they felt much better.
+
+“Well,” remarked Tom, after a while, “shall we take a chance, and go
+look at the men at work?”
+
+“I think so,” answered Mr. Jenks. “The sooner we discover this mystery,
+the better. Then we can go back home.”
+
+“And recover my airship,” added Tom, who was a bit uneasy regarding the
+safety of the Red Cloud.
+
+“Then, bless my finger-rings! let's go and see if we can find the big
+cave your friend the ghost told us of,” suggested Mr. Damon.
+
+Cautiously they made their way along the passage Bill had pointed out.
+As they went forward the subdued noise became louder, and finally they
+could feel the vibration of machinery.
+
+“This is the place,” whispered Mr. Jenks. “That sound we hear is one of
+the mixing machines, for grinding the materials--carbon and the other
+substances--which go to make up the diamonds. I remember hearing that
+when I was in the cave before.”
+
+“Then we must be near the place,” observed Tom.
+
+“Yes, but I didn't have much chance to look around when I was here
+before. They wouldn't let me. I never even knew of the small cave Bill
+took us to.”
+
+“Well, if we're close to it, we'd better go cautiously, and not talk any
+more than we're obliged to,” suggested Mr. Parker, and they agreed that
+this was good advice.
+
+They walked on softly. Suddenly Tom, who was in the lead, saw a gleam of
+light.
+
+“We're here,” he whispered. “I'll put out our lantern, now,” which he
+did. Then, stealing forward he and the others beheld a curious sight.
+The tunnel they were in ended at a small hole which opened into a large
+cavern, and, fortunately, this opening was concealed from the view of
+those in the main place.
+
+“The diamond makers!” whispered Tom, hoarsely, pointing to several men
+grouped about a number of strange machines.
+
+“Yes--the very place where I was,” answered Mr. Jenks, “and there is the
+apparatus--the steel box--from which the diamonds are taken--now to see
+how they make them.”
+
+Fascinated, the adventurers looked into the cave. The men there were
+unaware of the presence of our friends, and were busily engaged. Some
+attended to the grinding machine, the roar and clatter of which made
+it possible for Tom and the others to talk and move about without being
+overheard. Into this machine certain ingredients were put, and they were
+then pulverized, and taken out in powdery form.
+
+The power to run the mixing machine was a gasoline motor, which
+chug-chugged away in one corner of the cave.
+
+As the powder was taken out, other men fashioned it into small balls,
+which were put on pan, and into a sort of oven, that was heated by a
+gasoline stove.
+
+“Is that how they make the diamonds?” asked Mr. Damon.
+
+“That is evidently the first step,” said Mr. Jenks. “Those balls of
+powdered chemicals are partly baked, and then they are put into the
+steel box. In some way terrific heat and pressure are applied, and the
+diamonds are made. But how the heat and pressure are obtained is what we
+have yet to learn.”
+
+He paused to watch the men at work. They were all busy, some attending
+to the machines, and others coming and going in and out of the cave. In
+one part a man was apparently getting ready a meal.
+
+Suddenly there rushed into the cave a man who seemed much excited.
+
+“Are you nearly ready with that stuff?” he cried. “There's a good storm
+gathering on the mountain!”
+
+“Yes, we'll be ready in half an hour,” answered one of the men at the
+mixing machine.
+
+“Good. It will be flashing lightning bolts then, and we can see what
+luck we have. The last batch was a failure.” The man hurried out again.
+Mr. Parker touched Tom and Mr. Jenks on their shoulders.
+
+“What is it?” asked Tom.
+
+“I know the secret of making the diamonds,” said the scientist.
+
+“What?” cried Mr. Jenks.
+
+“It is by the awful power of the lightning bolts!” whispered Mr. Parker.
+“Everything is explained now--the reason why they make diamonds in this
+lonely place, near the top of the mountain. They need a place where the
+lightning is powerful. I can understand it now--I suspected it before.
+They make diamonds by lightning!”
+
+“Are you sure?” cried Mr. Jenks.
+
+“Positive.”
+
+“I agree with you,” said Tom Swift. “I was just getting on that track
+myself, when I saw the electric wires running to the steel box. That
+explains the upright rod on the top of the mountain. The man says
+a storm is coming--very well; we'll stay here and watch them make
+diamonds!”
+
+As he spoke there came the mutter of thunder, and the mountain vibrated
+slightly. The men in the cave redoubled their activity. Tom and his
+friends felt that the secret process they had so long sought was about
+to be demonstrated before their eyes.
+
+
+
+CHAPTER XXI--FLASHING GEMS
+
+
+Eagerly the adventurers looked through the opening at the end of the
+passage into the larger cave. The men opened the small oven in which the
+balls of white chemicals and carbon mixed, had been baked, and a pile of
+things, that looked like irregularly-shaped marbles, were placed in the
+steel box.
+
+This box, which was about the size of a trunk, was of massive metal. It
+was placed in a recess in the solid rock, and all about were layers of
+asbestos and other substances that were nonconductors of heat.
+
+“That box becomes red hot,” exclaimed Mr. Jenks, in a whisper. “When
+things are in readiness, that lever is pulled and the diamonds are
+made. I pulled it once, but I did not then know the process involved. I
+supposed that the lightning had nothing to do with making the diamonds.”
+
+“It has--a most important part,” said Mr. Parker. The hidden adventurers
+could talk in perfect safety now, for the men in the large cave were too
+excited to pay much attention to them. The muttering of the thunder
+grew louder, and at times a particularly loud crash told that a bolt had
+struck somewhere in the vicinity of the cave.
+
+“But, bless my watch-charm!” exclaimed Mr. Damon, “I didn't know
+lightning made diamonds.”
+
+“It does not--always,” went on the scientist. “But great heat and
+pressure are necessary to create the gems. In nature this was probably
+obtained by prehistoric volcanic fires, and by the terrific pressure of
+immense rocks. It is possible to make diamonds in the laboratory of the
+chemist, but they are so minute as to be practically valueless.
+
+“However, these men seem to have hit upon a new plan. They utilize the
+terrific heat of lightning, and the pressure which is instantaneously
+obtained when the bolt strikes. I am anxious to see how it is done.
+Look, I think they are getting ready to make the gems.”
+
+Indeed there seemed to be an air of expectancy among the diamond makers.
+The mixing machine had now been stopped, and, as it was more quiet
+in the cave, our friends, in their hiding-place, had to speak in mere
+whispers. All the men were now gathered about the great steel box.
+
+This receptacle had been closed by a solid metal door, which was screwed
+and clamped tight. Then one of the men examined a number of heavily
+insulated electric wires that extended from the box off into the
+darkness where Tom and his companions could not discern them.
+
+“That's Folwell--the man I befriended, and who got me into this game,”
+ whispered Mr. Jenks. “He was also one of the first to turn against me. I
+think he's one of the leaders.”
+
+Folwell came back, after having gone into a dark part of the cave. He
+went over to an electrical switch on one of the stone walls.
+
+“It's almost time,” Tom heard him say to his confederates. “The storm is
+coming up rapidly.”
+
+“Will it be severe enough?” asked one of the helpers. “We had all our
+work for nothing last time. The flashes weren't heavy enough.”
+
+“These will be,” asserted Folwell. “The indicator shows nearly a million
+volts now, and it's increasing.”
+
+“A million volts!” exclaimed Tom. “I hope it doesn't strike anywhere
+around here.”
+
+“Oh, it will probably be harmlessly conducted down on the heavy wires,”
+ said Mr. Parker. “We are in no danger, at present, though ultimately I
+expect to see the whole mountain shattered by a lightning bolt.”
+
+“Cheerful prospect,” murmured Tom.
+
+There was a terrific crash outside. The rocky floor of the cave
+trembled.
+
+“Here she comes!” cried Folwell. “Get back, everybody! I'm going to
+throw over the switch now!”
+
+The men retreated well away from the steel box. Folwell threw over the
+lever--the same one Mr. Jenks remembered pulling. Then the man ran
+to the electric switch on the wall, and snapped that into place,
+establishing a connection.
+
+There was a moment's pause, as Folwell ran to join the others in their
+place of safety. Then from without there came a most nerve-racking and
+terrifying crash. It seemed as if the very mountain would be rent into
+fragments.
+
+Watching with eager eyes, the adventurers saw sparks flash from the
+steel box. Instantly it became red hot, and then glowed white and
+incandescent. It was almost at the melting point.
+
+Then came comparative quiet, as the echoes of the thunder died away amid
+the mountain peaks.
+
+“I guess that did the trick!” cried Folwell. “It was a terrific crash
+all right!”
+
+He and the others ran forward. The steel box was now a cherry red,
+for it was cooling. Folwell threw back the lever, and another man
+disconnected the switch. There was a period of waiting until the box was
+cool enough to open. Then the heavy door was swung back.
+
+With a long iron rod Folwell drew something from the retort. It was the
+tray which had held the white balls. But they were white no longer, for
+they had been turned into diamonds. From their hiding-place Tom and the
+others could see the flashing gems, for, in spite of the fact that the
+diamonds were uncut, some of them sparkled most brilliantly, due to the
+peculiar manner in which they were made.
+
+“We have the secret of the diamonds!” whispered Mr. Jenks. “There must
+be a quart of the gems there!”
+
+The men gathered about Folwell, uttering exclamations of delight. The
+diamonds were too hot to handle yet.
+
+“That's going some!” exclaimed the chief of the diamond makers. “We have
+a small fortune here.”
+
+The was a sudden commotion at one end of the cave. A man rushed in. At
+the sight of him Tom stared and uttered an exclamation.
+
+“Munson--the stowaway!” he whispered.
+
+“Hello!” cried Folwell, as he saw his confederate. “I thought you were
+East, keeping Jenks away from here.”
+
+“He got the best of me!” cried Munson, “he and that Tom Swift! I stowed
+away on their airship, but they found me out by a wireless message,
+and marooned me in the woods. I've been trying to get here ever since!
+Didn't you get my messages of warning?”
+
+“No--what warnings?” cried Folwell.
+
+“About Jenks, Tom Swift and the others. They're here--they must be on
+Phantom Mountain now. In fact, I shouldn't be surprised if they were in
+this cave. I traced them to their camp, but they're gone. They may be
+among us now--in some of the secret recesses!”
+
+For an instant Folwell stared at the bearer of these tidings. Then he
+cried out:
+
+“Scatter men, and find these fellows! We must get them before they
+discover our secret!”
+
+“It's too late--we know it!” exulted Tom Swift. Then he whispered to
+the others to hurry to the part of the cave where Bill Renshaw had first
+hidden them.
+
+
+
+
+CHAPTER XXII--PRISONERS
+
+
+“Do you think there is any danger of them finding us?” asked Mr. Damon,
+as he hurried along beside Tom.
+
+“I'm afraid so,” was the answer. “I've been worried ever since we saw
+Munson heading this way. But we couldn't do any differently.”
+
+“Perhaps Bill Renshaw may be able to conceal us,” suggested Mr. Jenks.
+“Very likely he knows that Munson is on hand. Perhaps we will be safe
+for a while. I want to make a few more observations as to how they
+manufacture the diamonds, and then, with what I already know, I'll have
+the secret.”
+
+“And I'd like to make some scientific tests of the sides and bottom
+rocks of the cave,” spoke Mr. Parker. “I think it will bear out my
+theory that the mountain will soon be destroyed.”
+
+“Well, you were right about Earthquake Island, and you may be right
+about this mountain,” said Tom, “but if it is going to be annihilated I
+hope we get far enough away from it.”
+
+“We can keep our presence here a secret for a few more days, I think
+that will be long enough,” proceeded Mr. Jenks. “Then we will leave.”
+
+“And, in the meanwhile, they'll be searching for us,” objected Mr.
+Damon. “I wish that ghost-chap would come back and tell us what to do.
+Bless my liver-pin, but we are going to be in considerable danger, I'm
+afraid! Those men may capture us, and decide to make diamond dust from
+us.”
+
+“Come on--hurry to the little cave,” urged Tom. “Then we'll get ready to
+defend ourselves.”
+
+“The main cave is a large one,” said Mr. Jenks, “and there are many
+hiding places in it. In fact, it is so large that it will take those
+fellows several days to complete a circuit of it. By that time Bill
+Renshaw may come back, and take us to some place in which they have
+already searched for us. Then we'll be comparatively safe.”
+
+This thought was some consolation to them, as they made their way
+through the dark passage, dimly illuminated by the lantern they had
+rekindled, to the place where Bill had hidden them. They found things
+as they had left them, and proceeded to get a meal, though Tom said it
+would be best not to cook anything, or even to make coffee, for fear the
+odors would enable the searchers to trail them.
+
+So they ate cold food, glad to get that. Silently they sat about the
+dimly-lighted cavern, and discussed the situation. True they might even
+now retreat, going out of the entrance Bill had showed them, and so
+escape. But Mr. Jenks felt that his mission was not completed yet, and
+they all agreed to stay with him.
+
+“For there are several points about making diamonds that are not
+quite clear to me,” he said. “I need to know how that steel box is
+constructed, how the electrical switches are arranged, what kind of
+lightning rods they use, and how they regulate the pressure. The other
+things, and how to mix the ingredients, I already know.”
+
+“Then we'll do our best to help you,” promised Tom. “But now I think we
+had better see what sort of a defense we can put up. We have our guns
+and revolvers, and with these chairs and tables we can build a sort of
+barricade behind which we can take refuge if those fellows do discover
+our hiding place.”
+
+This was conceded to be a good idea, and soon a rude sort of fort was
+made, behind which the adventurers could take their stand and fight, if
+necessary, though they hoped this would not come to pass.
+
+They remained quietly in the cave the remainder of that day, and, when
+it was night, as they could tell by their timepieces--there was no
+daylight--they divided the hours into watches, taking turns standing
+guard.
+
+Morning, at least in point of time, came without any disturbance, and
+they made a cold breakfast. They hoped that Bill Renshaw would come, but
+he did not appear.
+
+After sitting in the dark cave until afternoon, Tom said:
+
+“I think we might as well go and take another observation of the big
+cave. We can tell what the men are doing, then, for they don't seem to
+have been near us. Maybe they have given up the search for us, and we
+can see them at work, and Mr. Jenks can gain what further knowledge he
+needs.”
+
+“That will be a good plan,” agreed the diamond man. “It's maddening to
+sit here, doing nothing.”
+
+“And it will be comparatively safe to go from here to our former post of
+observation,” added Tom, “for there doesn't seem to be any opening along
+the tunnel, into the larger cave, except the place where we were.”
+
+Accordingly they started off. Cautiously they looked through the opening
+into the apartment where they had seen the diamonds made.
+
+“There's not a soul here!” exclaimed Tom, in a whisper. The others
+looked. The place was deserted--the machinery silent. Mr. Jenks peered
+in for a moment, and then exclaimed:
+
+“I'm going in! Now's my chance to find out all that I wish to know! It
+may never come again, and then we can soon leave Phantom Mountain!”
+
+It was a daring plan, but it seemed to be the best one to follow. They
+were all tired of inactivity. Mr. Jenks managed to get through the
+opening, and dropped into the big cave. The others followed. Mr. Jenks
+hurried over to the steel box, and began an examination of it. Tom Swift
+was looking at the electrical switch. He saw how it was constructed. Mr.
+Damon and Mr. Parker were peering interestedly about.
+
+Suddenly the sound of voices was heard, and the echo of footsteps. Mr.
+Jenks started.
+
+“They're coming back!” he whispered hoarsely. “Run!”
+
+They all turned and sped toward their hiding place. But they were too
+late. An instant later Folwell, Munson and the other diamond makers
+confronted them. Our friends made a bold rush, but were caught before
+they could go ten feet.
+
+“We have them!” cried Munson. “They walked right into our hands!”
+
+It was true. Tom Swift and the others were the prisoners of the diamond
+makers.
+
+
+
+CHAPTER XXIII--BROKEN BONDS
+
+
+“Well,” remarked Tom Swift, in mournful tones, “this looks as if we were
+up against it; doesn't it?”
+
+“Bless my umbrella, it certainly does,” agreed Mr. Damon.
+
+“And it's all my fault,” said Mr. Jenks. “I shouldn't have gone into the
+big cave. I might have known those men would come back any time.”
+
+The above conversation took place as our friends lay securely bound in
+a small cave, or recess, opening from the larger cavern, where, about
+an hour before, they had been captured and made prisoners by the diamond
+makers. Despite their struggles they had been overpowered and bound,
+being carried to the cave, where they were laid in a row on some old
+bags.
+
+“It certainly is a most unpleasant situation, to say the least,”
+ observed Mr. Parker.
+
+“And all my fault,” repeated Mr. Jenks.
+
+“Oh, no it isn't,” declared Tom Swift, quickly. “We were just as ready
+to follow you into that cave as you were to go. No one could tell that
+the men would return so soon. It's nobody's fault. It's just our bad
+luck.”
+
+From where he lay, tied hand and foot, the young inventor could look
+out into the cave where he and the others had been caught. The diamond
+makers were busily engaged, apparently in getting ready to manufacture
+another batch of the precious stones. They paid little attention to
+their captives, save to warn them, when they had first been taken into
+the little cave, that it was useless to try to escape.
+
+“They needn't have told us that,” observed Tom, as he and the others
+were talking over their situation in low voices. “I don't believe any
+one could loosen these ropes.”
+
+“They certainly are pretty tight,” agreed Mr. Damon. “I've been tugging
+and straining at mine for the last half hour, and all I've succeeded in
+doing is to make the cords cut into my flesh.”
+
+“Better give it up,” advised Mr. Jenks.
+
+“We'll just have to wait.”
+
+“For what?” the scientist wanted to know.
+
+“To see what they'll do with us. They can't keep us here forever.
+They'll have to let us go some time.” Following their capture, Folwell
+and Munson, the latter the stowaway of the airship, had been in earnest
+conversation regarding our friends, but what conclusion they had reached
+the adventurers could only guess.
+
+“And we didn't have time to examine the diamond-making machinery close
+enough so that we could duplicate it if necessary,” complained Tom, a
+little later.
+
+“No,” agreed Mr. Jenks. “There are certain things about it that are not
+clear to me. Well, I don't believe I'll have another chance to inspect
+it. They'll take good care of that, though they seem to be getting ready
+to make more diamonds.”
+
+“Perhaps they're going to manufacture a big batch, and then leave this
+place,” suggested Mr. Damon. “They will probably go to some other secret
+cave, and leave us here.”
+
+“I hope they untie us before they leave, and give us something to eat,”
+ remarked the young inventor.
+
+For two hours longer the captives lay there, in most uncomfortable
+positions. Then Folwell and Munson, leaving the group of diamond makers
+who were grouped about the machinery, approached the captives.
+
+“Well,” remarked Munson, “we got ahead of you after all; didn't we. You
+thought you had our secret, but it will be a long while before you ever
+make diamonds.”
+
+“What are you going to do with us?” asked Tom.
+
+“Never mind. You came where you had no right to, and you must take the
+consequences.”
+
+“We did have a right to come here!” exclaimed Mr. Jenks. “I am entitled
+to know how the diamonds are made. I paid for the information, and you
+tricked me. If ever it's possible I'll have the whole gang arrested for
+swindling.”
+
+“You'll never get the chance!” declared Folwell. “You were given some
+diamonds for the money you invested, and that makes us square.”
+
+“No, it doesn't!” declared Mr. Jenks. “I invested the money to learn how
+to make diamonds, and you know it! You tricked me, and I had a right
+to try to discover your secret! I nearly have it, too, and I'll get it
+completely before I'm done with you!”
+
+“No, you won't!” boasted Folwell. “But we didn't come here to tell you
+that. We came to give you something to eat. We're not savages and
+we'll treat you as well as we can in spite of the fact that you are
+trespassers. We're going to give you some grub, but I warn you that any
+attempt to escape will mean that some of you will get hurt.”
+
+He signalled to some of his confederates. These men unbound the
+captives' arms, and stood over them while they ate some coarse food that
+was brought into the small cave. They were given coffee to drink, and
+then, when the simple meal was over, they were securely bound again,
+and left to themselves, while the diamond makers went back to their
+machinery.
+
+It was evident that they were going to attempt a big operation, for an
+unusually large quantity of the white stuff was prepared. The prisoners
+watched them idly. They could see some but not all of the operations. In
+this way several hours passed.
+
+Gloom possessed the hearts of Tom and his friends. Not only had their
+expedition been almost a failure so far, but the young inventor was
+worried lest the gang might discover and wreck his airship. This would
+prove a serious loss. Lying there in the semi-darkness the lad imagined
+all sorts of unpleasant happenings.
+
+At times he dozed off, as did the others. They had become somewhat used
+to the pain caused by the bonds, for their nerves were numb from the
+strain and pressure.
+
+Once, as he was lightly sleeping, Tom was awakened by hearing loud
+voices in the main cave. He looked out, rolling over slightly to get a
+better view. He saw the man who, once before had run in to give news of
+an approaching electrical storm.
+
+“Are you fellows all ready?” asked this same man again.
+
+“Yes. Is there another storm coming?”
+
+“Yes, and it's going to be a corker!” was the reply. “It's one of the
+worst I've ever seen. It's sweeping right up the valley. It'll be here
+in an hour.”
+
+“That's good. We need a big flash to make all the material we have
+prepared into diamonds. It's the biggest batch we ever tried. I hope it
+succeeds, for we're going to leave--” The rest was in so low a tone that
+Tom could not catch it.
+
+The storm messenger departed. Folwell and Munson busied themselves about
+the machinery. Tom dozed off again, dimly wondering what had become of
+Bill Renshaw, and whether the former ghost knew of their plight. The
+others were asleep, as the young inventor saw by the dim light of a
+lantern in the cave. Then, he too, shut his eyes.
+
+Tom was suddenly awakened by feeling some one's hands moving about his
+clothing. At first he thought it was one of the diamond-making gang, who
+had sneaked in to rob him. “Here! What are you up to?” exclaimed Tom.
+
+“Quiet!” cautioned a voice. “Are you all here?”
+
+“All of us--yes. But who are you?”
+
+“Easy--keep quiet, Tom Swift! I'm Bill Renshaw! I've been searching all
+over for you, since I got back to your cave and found it empty. Now I'm
+going to free you. I got in here by a secret entrance. Wait, I'll cut
+your ropes.” There was a slight sound, and an instant later Tom was
+freed from his bonds.
+
+
+
+
+CHAPTER XXIV--IN GREAT PERIL
+
+
+The young inventor could scarcely believe the good luck that had so
+unexpectedly come to him and his companions. No sooner was Tom able to
+move freely about than Bill Renshaw performed the same service for Mr.
+Jenks and the others, cautioning them to be quiet as he awakened them,
+and cut the ropes.
+
+“Bless my circulation!” exclaimed Mr. Damon, in a hoarse whisper. “How
+did you ever get here. I'd given ourselves up for lost.”
+
+“Oh, I came in off the mountain, as there's a big storm due,” explained
+the man. “There was no need of me playing the haunt in daytime, anyhow.
+I went to the cave, found you and your things gone, and I surmised that
+you might have walked into some trap.”
+
+“We did,” admitted Mr. Jenks, grimly.
+
+“Well, I hunted around until I found you,” went on Bill. “This mountain
+is honeycombed with caves, all opening from the large one, I know them
+better than these fellows do, so I could explore freely, and keep out of
+their sight. They didn't know that there was a second entrance to this
+place, but I did, and I made for it, when I couldn't find you in some of
+the other caves where I looked. And, sure enough, here you were.”
+
+“Well, we can't thank you enough,” said Mr. Parker. “But you say there
+is a big storm coming?”
+
+“One of the biggest that's been around these parts in some time,”
+ replied Bill.
+
+“Then perhaps the mountain will be destroyed,” went on the scientist, as
+calmly as if he had remarked that it might rain.
+
+“I hope nothing like that happens until we get away,” spoke Mr. Damon,
+fervently.
+
+“What had we better do?” inquired Tom.
+
+“Get away, unless you want to discover some more of their secrets,”
+ advised Bill. “Those fellows are planning something, but I can't find
+out what it is. They are suspicious of me, I think. But they are up to
+something, and I believe, it would be best for you to leave while you
+have the chance. It may not be healthy to stay. That's why I did my best
+to untie you.”
+
+“We appreciate what you have done,” declared Mr. Jenks, “but I want my
+rights. I must learn a few more facts about how to make diamonds from
+lightning flashes, and then I will have the same secret they cheated me
+out of. I think if we wait a while we may be able to see the parts of
+the process that are not quite clear to us. What do you say, Tom Swift?”
+
+“Well, I would like to learn the secret,” replied the lad, “and if Bill
+thinks it's safe to stay here a while longer--”
+
+“Oh, I guess it will be safe enough,” was the reply. “Those fellows
+won't bother about you now that they are about to make some more
+diamonds. Besides, they think you're all tied up. Yes, you can stay here
+and watch, I reckon. I've got a couple of guns, and--”
+
+“Then we'll stay,” decided Tom. “We can put up a better fight now.”
+
+Silently, in their prison, but which they could now leave whenever they
+pleased, the adventurers watched the diamond makers once more. The same
+process they had witnessed before was gone through with. The white balls
+were put inside the steel box and sealed up. Then they waited for the
+storm to reach its height.
+
+That this would not be long was evidenced by the mutterings of thunder
+which every moment grew louder. The outburst of electrical fury was
+likely to take place momentarily, and that it would be unusually severe
+was shown by the precautions taken by the diamond makers. They attached
+a number of extra wires, and brought out some insulated, hard rubber
+platforms, on which they themselves stood. Tom and Mr. Jenks were much
+interested in watching this detail of the work, and sought to learn how
+each part of the process was done.
+
+“I almost think we can make diamonds, Tom, when we get back to
+civilization,” whispered Mr. Jenks.
+
+“I hope we can,” answered Tom, “and we can't get back any too soon to
+suit me. I want to be in my airship again.”
+
+“I don't blame you. But look, they are getting ready to adjust the
+switch.”
+
+The adventurers ceased their whispered talk, and eagerly watched the
+diamond makers. Folwell and Munson were hurrying to and fro in the big
+cave, attending to the adjustments of the machinery.
+
+“On your insulated plates--all of you,” Folwell gave the order. “This
+is going to be a terrific storm. The gage shows twice the power we have
+ever used, and it's creeping up every minute! We'll have more diamonds
+than ever had before!”
+
+“Yes, if the mountain isn't destroyed,” added Mr. Parker, in a low
+voice. “I predict that it will be split from top to bottom!”
+
+“Comforting,” thought Tom, grimly.
+
+“I guess we're all ready,” said Folwell, in a low tone to Munson. “We'd
+better get insulated ourselves. I'm going to throw the switch.”
+
+He did so. A moment later the man who had before given warning of the
+storm came dashing in. He was very much excited.
+
+“It's awful!” he cried. “The lightning is striking all over! Big rocks
+are being split like logs of wood!”
+
+“Well, it can't do any damage in here,” said Munson. “We are well
+protected. Get on one of the plates,” and he motioned to one of the
+hard-rubber platforms that was not occupied. The roar and rumble of the
+storm outside had given place to short terrific crashes. In their small
+cave the adventurers could feel the solid ground shake.
+
+A bluish light began dancing about the electrical wires. There was a
+smell of sulphur in the air. Crash after crash resounded outside. A
+flash of flame lit up the whole interior of the cave. It came from the
+copper switch.
+
+“Something's wrong with the insulation!” cried Munson.
+
+“Don't go near it!” yelled Folwell. “If you value your life, stand
+still!”
+
+Hardly had he spoken than inside the cavern there sounded a report like
+that of a small cannon. A big ball of fire danced about the middle of
+the cave and then leaped on top of the steel box.
+
+“This is a fearful storm,” cried Munson.
+
+The adventurers in the cave did not know what to say or do. They were in
+deadly peril.
+
+Suddenly there came a crash louder than any that had preceded it. The
+whole side of the cave where the switches were was a mass of bluish
+flame. Then came a ripping, tearing sound, and a tangle of wires and
+copper connections were thrown to the floor. At the same time the steel
+box, containing the materials from which diamonds were made, turned
+blue, and flames shot from it.
+
+“It's all up with us!” cried Munson. “Run for it, everybody! The wires
+are down, and this place will be an electric furnace in another minute!”
+
+He leaped toward the exit from the cave.
+
+“What about those fellows?” asked Folwell, indicating the place where
+Tom and the others had been tied.
+
+“They'll have to do the best they can! It's every man for himself, now!”
+ yelled Munson. There was a wild scramble from the cavern.
+
+“Come on!” cried Tom. “We must escape! It's our only chance!”
+
+He leaped into the big cave, followed by the others. Already long
+tongues of electrical fire were shooting out from the walls and roof as
+Tom Swift and his companions, evading them as best they could, sought
+safety in flight.
+
+
+
+CHAPTER XXV--THE MOUNTAIN SHATTERED--CONCLUSION
+
+
+“Can't we get some of the diamonds?” cried Mr. Damon, as he raced along
+behind Tom. “Now's our chance. Those fellows have all gone!” The odd man
+made a grab for something as he ran.
+
+“It's as much as our lives are worth,” declared the young inventor. “We
+dare not stop! Come on!”
+
+“I'd like to investigate some of the machinery,” spoke Mr. Jenks, “but I
+wouldn't stop, even for that.”
+
+“The storm is too dangerous,” called Bill Renshaw. “I can show you a
+shorter way out than the one those fellows have taken. Follow me.”
+
+“No way can be too short,” said Mr. Parker, solemnly. “This mountain
+will go to pieces shortly, I think!”
+
+Tom shuddered. He remembered how narrow had been their escape when
+Earthquake Island sank into the sea. And that some terrific upheaval was
+now imminent might be judged from the awful reports that sounded more
+plainly as the adventurers raced toward the opening of the cave. It was
+like the bombardment of some doomed city.
+
+Mr. Jenks and Tom cast one longing look behind at the complicated and
+expensive machinery that had been installed in the cave by the diamond
+makers. They had abandoned it, and in it lay the secret of making
+precious gems. But there was no time to stop now, and investigate.
+
+“This way,” urged Bill Renshaw. “We'll soon be out.”
+
+“But won't it be dangerous to go outside?” asked Mr. Damon. “Shan't we
+be struck by lightning? There is some protection in here.”
+
+“None at all,” said Mr. Parker, quickly. “This mountain is a natural
+lightning rod. To stay here in this cave will be sure death when the
+storm gets directly over it. And that will be very soon. We must get
+on insulated ground. Is there any part of this mountain that does not
+contain iron ore?” the scientist asked of the former spirit.
+
+“Yes; the way out by which we are going lands on a dirt hill.”
+
+“That's good; then we may be saved.”
+
+On they ran. They had no lanterns, but the blue light of the
+electricity, as it leaped from point to point inside the cave, where
+there were outcroppings of iron ore, made the place bright enough to
+see.
+
+“Here we are!” cried Bill Renshaw at length. “Here's the way out!”
+
+Making a sudden turn in the winding passage he showed the adventurers
+a small opening in the side of the crag. In an instant they had passed
+through, and found themselves in daylight once more. The sudden glare
+almost blinded them, for, though the sky was overcast by clouds, from
+which jagged tongues of lightning played, the outside was much lighter
+than the dark cave.
+
+“I should say it was a storm!” cried Tom Swift. “See, it is striking
+every minute, and all around us!”
+
+In fact, lightning bolts were falling on every side of the adventurers.
+Every time the balls of fire struck, they burst open great stones,
+or seared a livid scar on the face of some cliff. As for Tom and the
+others, they stood on a dry dirt hill, in which, fortunately, there was
+no iron ore. To this fact they undoubtedly owed their lives, though
+had there been rain, to moisten the ground and make the earth a good
+conductor of electricity, they probably would have been badly shocked.
+But the electrical outburst was not accompanied by rain.
+
+Tom looked up. He saw a compact mass of cloud moving toward the summit
+of the mountain on the slope of which they stood. From this cloud there
+played shafts of reddish-green fire.
+
+“Look!” called the young inventor to Mr. Parker. The instant the latter
+saw the cloud, he cried:
+
+“We must get away from here by all means! That is the center of the
+storm. As soon as it gets over the mountain, where that lightning rod
+is, all the electrical fluid will be discharged in one bolt at the
+mountain, and it will be destroyed! We must run, but keep on the dirt
+places! Run for your lives!”
+
+They needed no second warning. Turning, they fled down the steep side of
+the mountain, slipping and stumbling, but taking care not to step on any
+iron ore. Behind them flashed the lightning bolts.
+
+Suddenly there was a most awful crash. It seemed as if the end of the
+world had come, and the ear drums of Tom and his companion almost burst
+with the fearful report. The concussion knocked them down, and they lay
+stunned for a moment.
+
+Following the terrible report there was a low, rumbling sound. Hardly
+knowing whether he was dead or alive, Tom opened his eyes and looked
+about him. What he saw caused him to cry out in terror.
+
+The whole mountain seemed bathed in fire. Great blue, red and green
+flashes played around it. Then the towering cliff seemed to melt and
+crumble up, and the great peak, the top of it containing the diamond
+makers' cave, from which they had fled but a few minutes before, the
+entire summit was toppled over into the valley on the other side, and in
+the direction opposite to that where the adventurers stood.
+
+Then came a profound silence, and the lightning ceased. The storm was
+over, and only the rattle of stones and boulders, as they came to rest
+in the valley below, reached the ears of our friends.
+
+“Phantom Mountain has been destroyed, just as I said it would be,” spoke
+Mr. Parker, solemnly. Once more he had prophesied correctly.
+
+For a few minutes the adventurers hardly knew what to say. They arose
+awkwardly from the ground where the shock had tossed them. Then Tom
+remarked, as calmly as possible:
+
+“Well, it's all over. I guess we may as well get back to our airship.”
+
+“What became of Munson and the others?” asked Mr. Damon.
+
+Mr. Jenks pointed to the trail, far below. The figures of some men,
+running madly, could be seen.
+
+“There they go,” he said; “I fancy we have seen the last of them.” And
+they had, for some time at least.
+
+There was little use lingering any longer on Phantom Mountain--indeed
+little of it was left on which to remain. Looking back toward the place
+where the cave had been, Tom and the others started forward again.
+The diamond-making machinery had all been destroyed. So, also, had the
+finished diamonds stored in the cavern and the large supply which had
+probably been made by the last terrific crash. No one would ever have
+them now. Tom and Mr. Jenks felt a sense of disappointment, but they
+were glad to have escaped with their lives. They sought their former
+camp, but the tent and all their food was buried under tons of earth and
+rocks.
+
+Three days later, after rather severe hardships, they were near the
+place where they had left the Red Cloud. They had suffered cold and
+hunger, for they had no food supplies, and, had it not been that Bill
+Renshaw knew the haunts of some game, of which they managed to snare
+some, they would have fared badly, for they had left their guns in the
+cave.
+
+“Well, there are the trees behind which I hope my airship is hidden,”
+ announced Tom, as they came to the spot. “Good old Red Cloud! Maybe we
+won't do some eating when we get aboard, eh?”
+
+“Bless my appetite! but we certainly will!” cried Mr. Damon.
+
+“There's somebody walking around the place,” spoke Mr. Jenks.
+
+“I hope it's no one who has damaged the ship,” came from Tom,
+apprehensively. He broke into a run, and soon confronted an aged miner,
+who seemed to have established a rude sort of camp near the airship.
+
+“Is anything the matter?” asked Tom, breathlessly. “Is my airship all
+right?”
+
+“I guess she's all right, stranger,” was the reply. “I don't know much
+about these contraptions, but I haven't touched her. I knowed she was an
+airship, for I've seen pictures of 'em, and I've been waiting until the
+owner came along.”
+
+“Why?” asked Tom, wonderingly.
+
+“Because I've got a proposition to make to you,” went on the miner, who
+said his name was Abe Abercrombie. “I've been a miner for a good many
+years, and I'm just back from Alaska, prospecting around here. I haven't
+had any luck, but I know of a gold mine in Alaska that will make us all
+rich. Only it needs an airship to get to it, and I've been figuring how
+to hire one. Then I comes along, and I sees this big one, and I makes up
+my mind to stay here until the owners come back. That's what I've done.
+Now, if I prove that I'm telling the truth, will you go to Alaska--to
+the valley of gold with me?”
+
+“I don't know,” answered Tom, to whom the proposition was rather sudden.
+“We've just had some pretty startling adventures, and we're almost
+starved. Wait until we get something to eat, and we'll talk. Come aboard
+the Red Cloud,” and the lad led the way to his craft which was in as
+good condition as when he left it to go to the diamond cave. Later he
+listened to the miner's story.
+
+Tom Swift did go to the valley of gold in Alaska, and what happened to
+him and his companions there will be told of in the next volume of this
+series, to be called “Tom Swift in the Caves of Ice; or, the Wreck of
+the Airship.”
+
+It did not take our friends long, after they had eaten a hearty meal,
+to generate some fresh gas, and start the Red Cloud on her homeward way.
+Tom wanted to take Bill Renshaw with him, but the old man said he would
+rather remain among the mountains where he had been born. So, after
+paying him well for his services, they said good-by to him. Abercrombie,
+the miner, also remained behind, but promised to call and see Tom in a
+few months.
+
+“Well, we didn't make any money out of this trip,” observed Mr. Jenks,
+rather dubiously, as they were nearing Shopton, after an uneventful
+trip. “I guess I owe you considerable, Tom Swift. I promised to get you
+a lot of diamonds, but all I have are those I had from my first visit to
+the cave.”
+
+“Oh, that's all right,” spoke Tom, easily. “The experience was worth all
+the trip cost.”
+
+“Speaking of diamonds, look here!” exclaimed Mr. Damon, suddenly, and he
+pulled out a double handful.
+
+“Where did you get them?” cried the others in astonishment.
+
+“I grabbed them up, as we ran from the cave,” said the eccentric man;
+“but, bless my gaiters! I forgot all about them until you spoke. We'll
+share them.”
+
+These diamonds, some of which were large, proved very valuable, though
+the total sum was far below what Mr. Jenks hoped to make when he started
+on the remarkable trip. Tom gave Mary Nestor a very fine stone, and it
+was set in a ring, instead of a pin, this time.
+
+On their arrival in Shopton, where Mr. Swift, the housekeeper, Mr.
+Jackson and Eradicate Sampson were much alarmed for Tom's safety, an
+attempt was made to manufacture diamonds, using a powerful electric
+current instead of lightning. But it was not a success, and so Mr. Jenks
+concluded to give up his search for the secret which was lost on Phantom
+Mountain.
+
+And now we will take leave of Tom Swift, to meet him again soon in other
+adventures he is destined to have in the caves of ice and the valley of
+gold.
+
+
+
+
+THE END
+
+
+
+
+ THE TOM SWIFT SERIES
+
+ By VICTOR APPLETON
+
+
+ TOM SWIFT AND HIS MOTOR CYCLE
+ Or Fun and Adventure on the Road
+ TOM SWIFT AND HIS MOTOR BOAT
+ Or The Rivals of Lake Carlopa
+ TOM SWIFT AND HIS AIRSHIP
+ Or The Stirring Cruise of the Red Cloud
+ TOM SWIFT AND HIS SUBMARINE BOAT
+ Or Under the Ocean for Sunken Treasure
+ TOM SWIFT AND HIS ELECTRIC RUNABOUT
+ Or The Speediest Car on the Road
+ TOM SWIFT AND HIS WIRELESS MESSAGE
+ Or The Castaways of Earthquake Island
+ TOM SWIFT AMONG THE DIAMOND MAKERS
+ Or The Secret of Phantom Mountain
+ TOM SWIFT IN THE CAVES OF ICE
+ Or The wreck of the Airship
+ TOM SWIFT AND HIS SKY RACER
+ Or The Quickest Flight on Record
+ TOM SWIFT AND HIS ELECTRIC RIFLE
+ Or Daring Adventures In Elephant Land
+ TOM SWIFT IN THE CITY OF GOLD
+ Or Marvelous Adventures Underground
+ TOM SWIFT AND HIS AIR GLIDER
+ Or seeking the Platinum Treasure
+ TOM SWIFT IN CAPTIVITY
+ Or A Daring Escape by Airship
+ TOM SWIFT AND HIS WIZARD CAMERA
+ Or The Perils of Moving Picture Taking
+ TOM SWIFT AND HIS GREAT SEARCHLIGHT
+ Or On the Border for Uncle Sam
+ TOM SWIFT AND HIS GIANT CANNON
+ Or The Longest Shots on Record
+ TOM SWIFT AND HIS PHOTO TELEPHONE
+ Or The Picture that Saved a Fortune
+ TOM SWIFT AND HIS AERIAL WARSHIP
+ Or The Naval Terror of the Seas
+ TOM SWIFT AND HIS BIG TUNNEL
+ Or The Hidden City of the Andes
+
+
+
+
+ THE MOTION PICTURE CHUMS SERIES
+
+ By VICTOR APPLETON
+
+
+ In these stories we follow the adventures of three boys, who,
+ after purchasing at auction the contents of a moving picture
+ house, open a theatre of their own. Their many trials and
+ tribulations, leading up to the final success of their venture,
+ make very entertaining stories.
+
+ THE MOTION PICTURE CHUMS' FIRST VENTURE
+
+ Or Opening a Photo Playhouse in Fairlands.
+
+ The adventures of Frank, Randy and Pep in running a Motion
+ Picture show. They had trials and tribulations but finally
+ succeed.
+
+ THE MOTION PICTURE CHUMS AT SEASIDE PARK
+
+ Or The Rival Photo Theatres of the Boardwalk.
+
+ Their success at Fairlands encourages the boys to open their
+ show at Seaside Park, where they have exciting adventures--also a
+ profitable season.
+
+ THE MOTION PICTURE CHUMS ON BROADWAY
+
+ Or The Mystery of the Missing Cash Box.
+
+ Backed by a rich western friend the chums established a photo
+ playhouse in the great metropolis, where new adventures await
+ them.
+
+ THE MOTION PICTURE CHUMS' OUTDOOR EXHIBITION
+
+ Or The Film that Solved a Mystery.
+
+ This time the playhouse was in a big summer park. How a
+ film that was shown gave a clew to an important mystery
+ is interestingly related.
+
+ THE MOTION PICTURE CHUMS' NEW IDEA
+
+ Or The First Educational Photo Playhouse.
+
+ In this book the scene is shifted to Boston, and there is
+ intense rivalry in the establishment of photo playhouses of
+ educational value.
+
+ THE MOTION PICTURE CHUMS AT THE FAIR
+
+ Or The Greatest Film Ever Exhibited.
+
+ The chums go to San Francisco, where they have some trials
+ but finally meet with great success.
+
+ THE MOTION PICTURE CHUMS' WAR SPECTACLE
+
+ Or The Film that Won the Prize.
+
+ Through being of service to the writer of a great scenario, the
+ chums are enabled to produce it and win a prize.
+
+
+
+
+ THE BOYS OF COLUMBIA HIGH SERIES
+
+ By GRAHAM B. FORBES
+
+
+ Never was there a cleaner, brighter, more manly boy than Frank
+ Allen, the hero of this series of boys tales, and never was there
+ a better crowd of lads to associate with than the students of the
+ School. All boys will read these stories with deep interest. The
+ rivalry between the towns along the river was of the keenest, and
+ plots and counterplots to win the champions, at baseball, at
+ football, at boat racing, at track athletics, and at ice hockey,
+ were without number. Any lad reading one volume of this series
+ will surely want the others.
+
+ THE BOYS OF COLUMBIA HIGH
+ Or The All Around Rivals of the School
+
+ THE BOYS OF COLUMBIA HIGH ON THE DIAMOND
+ Or Winning Out by Pluck
+
+ THE BOYS OF COLUMBIA HIGH ON THE RIVER
+ Or The Boat Race Plot that Failed
+
+ THE BOYS OF COLUMBIA HIGH ON THE GRIDIRON
+ Or The Struggle for the Silver Cup
+
+ THE BOYS OF COLUMBIA HIGH ON THE ICE
+ Or Out for the Hockey Championship
+
+ THE BOYS OF COLUMBIA HIGH IN TRACK ATHLETICS
+ Or A Long Run that Won
+
+ THE BOYS OF COLUMBIA HIGH IN WINTER SPORTS
+ Or Stirring Doings on Skates and Iceboats
+
+
+ 12mo. Illustrated. Handsomely bound in cloth, with cover design
+ and wrappers in colors.
+
+ GROSSET & DUNLAP, PUBLISHERS, NEW YORK
+
+
+
+
+ THE OUTDOOR CHUMS SERIES
+
+ By CAPTAIN QUINCY ALLEN
+
+
+ The outdoor chums are four wide-awake lads, Sons of wealthy men
+ of a small city located on a lake. The boys love outdoor life,
+ and are greatly interested in hunting, fishing, and picture
+ taking. They have motor cycles, motor boats, canoes, etc., and
+ during their vacations go everywhere and have all sorts of
+ thrilling adventures. The stories give full directions for
+ camping out, how to fish, how to hunt wild animals and prepare
+ the skins for stuffing, how to manage a canoe, how to swim, etc.
+ Full of the spirit of outdoor life.
+
+ THE OUTDOOR CHUMS
+ Or The First Tour of the Rod, Gun and Camera Club.
+
+ THE OUTDOOR CHUMS ON THE LAKE
+ Or Lively Adventures on Wildcat Island.
+
+ THE OUTDOOR CHUMS IN THE FOREST
+ Or Laying the Ghost of Oak Ridge.
+
+ THE OUTDOOR CHUMS ON THE GULF
+ Or Rescuing the Lost Balloonists.
+
+ THE OUTDOOR CHUMS AFTER BIG GAME
+ Or Perilous Adventures in the Wilderness.
+
+ THE OUTDOOR CHUMS ON A HOUSEBOAT
+ Or The Rivals of the Mississippi.
+
+ THE OUTDOOR CHUMS IN THE BIG WOODS
+ Or The Rival Hunters at Lumber Run.
+
+ THE OUTDOOR CHUMS AT CABIN POINT
+ Or The Golden Cup Mystery.
+
+
+
+
+
+
+End of the Project Gutenberg EBook of Tom Swift Among The Diamond Makers, by
+Victor Appleton
+
+*** END OF THE PROJECT GUTENBERG EBOOK 1282 ***