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