The trail was one to try a llama. I climbed boulders and leaped across chasms and clung to narrow, slippery edges with my finger-nails. Several times I narrowly escaped dumping myself into the lake, and half the time I was in plain view of the Incas on the raft.

My hands and feet were bruised and bleeding, and I had bumped into walls and boulders so often that I was surprised when I took a step without getting a blow. I wanted those spears.

I found myself finally within a few yards of my destination. A narrow crevice led from where I stood directly to the ledge from which the Incas had embarked. It was now necessary to wait till they returned to the shore, and I drew back into the darkness of a near-by corner and stood motionless.

They were still on the raft in the middle of the lake, waiting, spear in hand. I watched them in furious impatience, on the border of mania.

Suddenly I saw a dark, crouching form outlined against a boulder not ten feet away from where I stood. The form was human, but in some way unlike the Incas I had seen. I could not see its face, but the alertness suggested by its attitude made me certain that I had been discovered.

Vaguely I felt myself surrounded on every side; I seemed to feel eyes gazing unseen from every direction, but I could not force myself to search the darkness; my heart rose to my throat and choked me, and I stood absolutely powerless to make a sound or movement, gazing in a sort of dumb fascination at that silent, crouching figure.

Suddenly it crouched lower still against the black background of the boulder.

"Another second and he will be at my throat," I thought—but I stood still, unable to move.

But the figure did not spring. Instead, it suddenly straightened up to almost twice the height of an Inca, and I caught a glimpse of a white face and ragged, clinging garments.

"Harry!" I whispered. I wonder yet that it was not a shout.