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<h2> CHAPTER XIII—ON PHANTOM MOUNTAIN </h2>
<p>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.</p>
<p>“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!”</p>
<p>“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.”</p>
<p>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.</p>
<p>“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.”</p>
<p>“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.”</p>
<p>“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?”</p>
<p>“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.”</p>
<p>“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.”</p>
<p>“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.”</p>
<p>“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?”</p>
<p>“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.”</p>
<p>“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.”</p>
<p>“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!”</p>
<p>“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.”</p>
<p>“Why?” asked Tom, curiously.</p>
<p>“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.</p>
<p>“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.”</p>
<p>“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.”</p>
<p>“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.”</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>“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?”</p>
<p>“I guess so,” answered Mr. Damon. “How long are we going to be away?”</p>
<p>“Until we find the diamond makers!” declared Tom, firmly.</p>
<p>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.</p>
<p>“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.</p>
<p>“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.”</p>
<p>“But why can't you follow the directions given by the miner who told you
about Phantom Mountain?” asked Mr. Damon.</p>
<p>“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.”</p>
<p>“And we've got to hunt until we find it; is that the idea?” asked Mr.
Parker.</p>
<p>“Or until we see the phantom,” added Tom, in a low voice.</p>
<p>“Bless my topknot!” exclaimed Mr. Damon. “You don't mean to say you expect
to see that ghost; do you Tom?”</p>
<p>“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.</p>
<p>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.</p>
<p>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.</p>
<p>“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.”</p>
<p>“What is that?” inquired Mr. Jenks.</p>
<p>“I think we should go up higher. In my opinion the cave is near the top of
some peak; isn't it, Mr. Jenks?”</p>
<p>“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.”</p>
<p>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.</p>
<p>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.</p>
<p>“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.</p>
<p>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.</p>
<p>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.</p>
<p>“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.</p>
<p>“It's the phantom—the phantom!” cried Tom, aloud. “It's the thing
the miner saw! We're on Phantom Mountain now!”</p>
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