All during the trip Billings had steadfastly evaded questions as to how we were to enter Caspak after we had found Caprona. Bowen Tyler's manuscript had made it perfectly evident to all that the subterranean outlet of the Caspakian River was the only means of ingress or egress to the crater world beyond the impregnable cliffs. Tyler 's party had been able to navigate this channel because their craft had been a submarine; but the Toreador could as easily have flown over the cliffs as sailed under them. Jimmy Hollis and Colin Short whiled away many an hour inventing schemes for surmounting the obstacle presented by the barrier cliffs, and making ridiculous wagers as to which one Tom Billings had in mind; but immediately we were all assured that we had raised Caprona, Billings called us together.
"There was no use in talking about these things," he said, "until we found the island. At best it can be but conjecture on our part until we have been able to scrutinize the coast closely. Each of us has formed a mental picture of the Capronian seacoast from Bowen's manuscript, and it is not likely that any two of these pictures resemble each other, or that any of them resemble the coast as we shall presently find it. I have in view three plans for scaling the cliffs, and the means for carrying out each is in the hold. There is an electric drill with plenty of waterproof cable to reach from the ship's dynamos to the cliff-top when the Toreador is anchored at a safe distance from shore, and there is sufficient half-inch iron rod to build a ladder from the base to the top of the cliff. It would be a long, arduous and dangerous work to bore the holes and insert the rungs of the ladder from the bottom upward; yet it can be done.
"I also have a life-saving mortar with which we might be able to throw a line over the summit of the cliffs; but this plan would necessitate one of us climbing to the top with the chances more than even that the line would cut at the summit, or the hooks at the upper end would slip.
"My third plan seems to me the most feasible. You all saw a number of large, heavy boxes lowered into the hold before we sailed. I know you did, because you asked me what they contained and commented upon the large letter 'H' which was painted upon each box. These boxes contain the various parts of a hydro-aeroplane. I purpose assembling this upon the strip of beach described in Bowen's manuscript—the beach where he found the dead body of the apelike man—provided there is sufficient space above high water; otherwise we shall have to assemble it on deck and lower it over the side. After it is assembled, I shall carry tackle and ropes to the cliff-top, and then it will be comparatively simple to hoist the search-party and its supplies in safety. Or I can make a sufficient number of trips to land the entire party in the valley beyond the barrier; all will depend, of course, upon what my first reconnaissance reveals."
That afternoon we steamed slowly along the face of Caprona's towering barrier.
"You see now," remarked Billings as we craned our necks to scan the summit thousands of feet above us, "how futile it would have been to waste our time in working out details of a plan to surmount those." And he jerked his thumb toward the cliffs. "It would take weeks, possibly months, to construct a ladder to the top. I had no conception of their formidable height. Our mortar would not carry a line halfway to the crest of the lowest point. There is no use discussing any plan other than the hydro-aeroplane. We'll find the beach and get busy."
Late the following morning the lookout announced that he could discern surf about a mile ahead; and as we approached, we all saw the line of breakers broken by a long sweep of rolling surf upon a narrow beach. The launch was lowered, and five of us made a landing, getting a good ducking in the ice-cold waters in the doing of it; but we were rewarded by the finding of the clean-picked bones of what might have been the skeleton of a high order of ape or a very low order of man, lying close to the base of the cliff. Billings was satisfied, as were the rest of us, that this was the beach mentioned by Bowen, and we further found that there was ample room to assemble the sea-plane.
Billings , having arrived at a decision, lost no time in acting, with the result that before mid-afternoon we had landed all the large boxes marked "H" upon the beach, and were busily engaged in opening them. Two days later the plane was assembled and tuned. We loaded tackles and ropes, water, food and ammunition in it, and then we each implored Billings to let us be the one to accompany him. But he would take no one. That was Billings ; if there was any especially difficult or dangerous work to be done, that one man could do, Billings always did it himself. If he needed assistance, he never called for volunteers—just selected the man or men he considered best qualified for the duty. He said that he considered the principles underlying all volunteer service fundamentally wrong, and that it seemed to him that calling for volunteers reflected upon the courage and loyalty of the entire command.
We rolled the plane down to the water's edge, and Billings mounted the pilot's seat. There was a moment's delay as he assured himself that he had everything necessary. Jimmy Hollis went over his armament and ammunition to see that nothing had been omitted. Besides pistol and rifle, there was the machine-gun mounted in front of him on the plane, and ammunition for all three. Bowen's account of the terrors of Caspak had impressed us all with the necessity for proper means of defense.
At last all was ready. The motor was started, and we pushed the plane out into the surf. A moment later, and she was skimming seaward. Gently she rose from the surface of the water, executed a wide spiral as she mounted rapidly, circled once far above us and then disappeared over the crest of the cliffs. We all stood silent and expectant, our eyes glued upon the towering summit above us. Hollis, who was now in command, consulted his wrist-watch at frequent intervals.
"Gad," exclaimed Short, "we ought to be hearing from him pretty soon!"
Hollis laughed nervously. "He's been gone only ten minutes," he announced.
"Seems like an hour," snapped Short. "What's that? Did you hear that? He's firing! It's the machine-gun! Oh, Lord; and here we are as helpless as a lot of old ladies ten thousand miles away! We can't do a thing. We don't know what's happening. Why didn't he let one of us go with him?"
Yes, it was the machine-gun. We would hear it distinctly for at least a minute. Then came silence. That was two weeks ago. We have had no sign nor signal from Tom Billings since.
Chapter 2
I'll never forget my first impressions of Caspak as I circled in, high over the surrounding cliffs. From the plane I looked down through a mist upon the blurred landscape beneath me. The hot, humid atmosphere of Caspak condenses as it is fanned by the cold Antarctic air-currents which sweep across the crater's top, sending a tenuous ribbon of vapor far out across the Pacific. Through this the picture gave one the suggestion of a colossal impressionistic canvas in greens and browns and scarlets and yellows surrounding the deep blue of the inland sea—just blobs of color taking form through the tumbling mist.
I dived close to the cliffs and skirted them for several miles without finding the least indication of a suitable landing-place; and then I swung back at a lower level, looking for a clearing close to the bottom of the mighty escarpment; but I could find none of sufficient area to insure safety. I was flying pretty low by this time, not only looking for landing places but watching the myriad life beneath me. I was down pretty well toward the south end of the island, where an arm of the lake reaches far inland, and I could see the surface of the water literally black with creatures of some sort. I was too far up to recognize individuals, but the general impression was of a vast army of amphibious monsters. The land was almost equally alive with crawling, leaping, running, flying things. It was one of the latter which nearly did for me while my attention was fixed upon the weird scene below.