The greatest adventure
to observe the easiest route up the rocks of the crater side, and by
flying toward it, direct them. But if by noon they did not come out of
the smoke she was to fly straight back to the ship and guide Bronson's
search party.
The men planned to descend the crater only far enough to learn what
they wished to know, Anderson and Ole whether oil was to be found, Lane
and Drake the appearance of the black cement in situ.
Edith accompanied the men on foot to the blowholes. Threading their
way between the huge carcasses the party methodically undid Ole's and
Edith's work of the previous afternoon. There being no further use
for the weighted hose and bent pipes they threw the sections down the
blowholes. No echoes rose.
"How on earth did you ever think of it?" Anderson asked Drake as he
heaved down the last bent pipe.
"As I told you," Drake answered modestly. "That siphon arrangement
the dentist puts into your mouth to keep it dry while he works gave
me the idea. If we could stick one leg of a pipe bent into a right
angle down a blowhole, laying the other flush along the surface of
the ice, some of the gas being forced up the hole would spray out
over the surrounding ice. From watching those flames the first day
we saw them I knew that the gas ignites only when it meets the air.
The columns of gas caught at the top. The flame only travelled down
the column as the upward pressure of the gas diminished. For this and
other obvious reasons it was clear that the flames did not start down
in the blowholes, at least not until after the pressure had decreased
markedly and the flames were about to be sucked down and extinguished.
A considerable volume of gas therefore would be blown out through the
pipes and hose over the ice before the flames descended low enough to
ignite the mixture of air and gas near the surface.
"As for the rest I trusted to nature. The gas, I knew from my school
chemistry, must be rich in carbon monoxide. Now carbon monoxide is
deadly in even minute quantities to all animal life. Less than a minute
under that enormous pressure would suffice to spray out enough of the
gas to asphyxiate an army of monsters. Long before it became rich
enough in carbon monoxide to explode the mixture of gas and air would
reach the point fatal to animal life. You saw what happened."
"The monsters probably did not actually die," Lane added, "until some
time after the flash. The gas they had inhaled took some minutes to do
its work thoroughly."
"Well," said Edith, sadly regarding the pathetic groups, "I am glad it
was painless. They just fell asleep."
"I shouldn't have cried if they had kicked a bit," Ole remarked
viciously.
"I'll never call you unpractical again," Edith said to Drake. "Merely
in putting these poor things out of their misery you have justified
your existence."
Drake shouldered his heavy pack and strode off after the others.
"Because a man prefers to use his head instead of his feet like
a baboon," he flung back, "you call him unpractical. You're as
short-sighted as the pick and shovel men in the street."
"Now don't get a swelled head over your smartness," she called after
him, "or you'll rise and burst like a toy balloon. Good-bye. I'll come
and fetch you when you stub your toe."
The men fully realized the danger of their undertaking. Although they
probably had exterminated one rookery of the huge monsters there must
be hundreds more infesting the ruined crater. They accordingly chose
a route down the steep side as nearly as possible in line with the
destroyed rookery. The scramble down over the chaotic fragments of
rock alone was no easy undertaking, nor was its safety increased by
the two hundred pounds of dynamite which the men carried. A slip on
the treacherous rocks might set off a private eruption. There was one
comforting thought, however, which gave them courage. Should one of
them stumble and explode his charge neither he nor the rest would ever
know it.
By noon they had safely descended about a thousand feet. Another
thousand feet would take them down to the rolling black billows.
Already the reek of burning petroleum was acrid in their nostrils. Ole
and the Captain, breathing deeply, filled their lungs with the odor of
wealth.
"Here you are, Anderson," said the Doctor. "Strike the rock and see the
oil gush forth." They were resting on a ledge of blocks at the base of
a two hundred foot cliff in the face of the crater wall. On either side
of the unbroken expanse of cement great void pockets and tunnels gaped
in the shattered wall of what, before the explosion which destroyed it,
had been a green paradise such as that of Edith's and Ole's discovery.
The whole wall probably was honeycombed with galleries, tunnels and
vast chambers which, until the eruption, had been sealed over by thick
masses of cement. The explanation of these which Lane gave later is
reasonable and probably correct.
"Where is my oil?" Anderson demanded.
"Almost anywhere behind those rocks if you go far enough, I should
say. For some time past I have noticed indications. See that stain up
there?" The Captain nodded. "That's oil. It is probably oozing along
a fissure through the rocks. Find the other end of the fissure and you
tap your first oil tank."
"But you said the other day that oil in this kind of rock--or
cement--is impossible."
"And I meant it. Since then I have done some thinking. The oil is
seeping through defects in the ruins of this artificial wall. I have
good reasons for supposing that this wall was built ages ago partly to
keep out the raw material that ultimately became oil."
"How thick is this cement?"
"I haven't the least idea. It may be a foot or a hundred miles. I
should chance a shot if I were you."
The Captain was already busy with his dynamite.
"Better stand aside when you do," Lane advised. "The oil may shoot you
into the middle of eternity."
Ole's steady swing soon drilled a hole for the stick of dynamite. He
stood back on the ledge a few feet wiping the sweat from his face while
Anderson placed the charge and laid out the three-minute fuse. He moved
forward to watch the Captain just in time. A fifty-ton block of the
black cement hurtled down from the brow of the cliff, shot directly
through the place where he had been standing, ricocheted on the lip of
the ledge and shattered itself to bits all down the steep slope to the
smoke.
"Who in hell did that?" Ole shouted, white with rage.
"Not guilty," said Drake, flattening himself against the wall just as
the next huge missile crashed clear of the ledge. Smaller fragments
showered down spattering the ledge with energetic chunks of cement
that stung and bruised the would be dynamiters.
"I have a theory," the Doctor announced with a wry smile when the
pelting finally ceased. "Pardon me, Ole, for taking it out of your
mouth. There is something alive up there moving about and dislodging
the loose blocks. Of course that first fifty-ton brick may have been
very nicely balanced, needing only a slight push to send it over. The
alternative is that our friend up there weighs two or three hundred
tons. Take your choice."
"What shall we do?" Anderson asked, going white.
"Go ahead with our work. If the brute comes down after us we can crawl
along the base of the cliff and get into one of those empty pockets.
The ledge peters out nicely over there to the right. That beast, if it
is the size I estimate, can't get a foothold on anything narrower than
a city highway."
"Yes," said Drake, "and this ledge right here is just broad enough for
the brute's rump. It will camp here for a week if necessary waiting for
us to come out to dinner."
"Would you prefer to race it to the bottom? The smoke down there, I
suspect, covers a multitude of prowlers feasting on the dead."
"It isn't so bad," the Captain said hopefully. "We can set off dynamite
sticks to scare the brute away."
"Our popgun won't annoy it after the explosions it must have heard in
the neighborhood of this exciting hole," Drake objected. "But your
idea is good. Edith will hear our efforts and bring help."
"Dessert, you mean," Lane dryly corrected him. "Go ahead, Captain,
touch it off. We might as well find out all there is to be known about
the place if we've got to die in it."
"If I strike oil," the Captain grimly rejoined, "I'll sell stock to the
devil himself."
He lit the fuse and followed the others to a safe place against the
wall.
The explosion flaked off a thick slab of the cement, revealing a deep
pocket, or possibly the entrance to a tunnel, similar to the others in
the face of the cliff. Not a drop of oil issued.
"Sold." The Captain swore heartily.
They followed him to the hole. The entrance was just high enough for a
tall man to walk through without bending his neck. Anderson entered.
His feet raised a cloud of greenish gray dust.
"Empty," he said to those without.
He was about to continue his disgruntled observations when a cascade of
rubble plunged over the top of the cliff. Not waiting for an invitation
the others joined him in the dark pocket. Their haste raised the
pungent, suffocating greenish gray dust in clouds.
"It's coming," said the Doctor. "Down the slope to the left as fast as
its tonnage will let it. Our fireworks attracted its attention."
"I hope it slips and breaks its beastly neck," Drake remarked viciously.
"Oh," the Doctor replied, "since the big blow-up here it probably has
acquired a sure foot in scrambling about this hole. Most likely it does
all its heavier feeding in Ole's tunnel restaurant, coming out here
merely for exercise and lighter refreshments. We're just in time for
lunch."
"I don't believe you give a damn whether you live or die," the Captain
snapped.
"Except for Edith's sake I don't. I would give a great deal to see one
of those brutes alive and at close quarters."
"You'll shake hands with it in five minutes."
"If it becomes too sociable I shall take a short cut out of my
troubles. Fit up one of your sticks with a cap and give it about a
ten-second fuse."
"Do you mean it?"
"Certainly. If I must die I see neither virtue nor courage in
deliberately choosing a hideous death. I shall not kiss death till hell
stares me in the face."
The Captain handed him the prepared stick of dynamite.
"If you go that way," he said, "the rest of us must follow, you know."
"Not necessarily. This pocket is almost a tunnel, I'm sure. It
certainly is long enough for you to get your packs out of danger of
detonation from my explosion."
"I'm for the shortcut," said Drake.
"So am I." It was Anderson.
"Then I must," said Ole. "In my case it won't be suicide. I do it
against my will."
Unstrapping his pack he knelt down and prayed, silently. The others
respectfully turned their backs, listening to the crash of falling
rocks heralding the approach of the monster. Anderson began to grow
nervous.
"We might as well go farther back," he suggested.
"All right," Lane replied. "You men leave your packs and go clear to
the back of the cave. I'll take three sticks together so as to be sure
of setting off the lot. It will be over before you know anything."
"What about you?"
"I'm going to see it. Don't be afraid. I shall take no chance of being
caught before my time."
Ole rose from his knees. Their gigantic enemy, to judge by the sounds,
was now lumbering its slow way along the ledge. Ole spoke.
"The Lord has answered."
"Let us hear what He said." The Captain was sarcastic. He disbelieved
in Ole's private conversations with headquarters. "Most likely it will
be your last message."
"That beast may be too big to get in through the hole."
"Then it will sit down outside and wait for us."
"I see your idea," Drake exclaimed. "When the brute squats we can