The first time he was away for several hours, and returned exhausted and empty-handed and without having found any exit other than the one by which we had entered.

He had ventured through that far enough to see a group of Incas on watch at the other end. They had seen him and sprung after him, but he had returned without injury, and at the entrance into the cavern where we lay they had halted abruptly.

The second time he was gone out more than half an hour, and the instant I saw his face when he returned I knew what had happened.

But I was not in the best of humor; his terror appeared to me to be ridiculously childish, and I said so in no uncertain terms.

But he was too profoundly agitated to show any anger.

"You don't know, you don't know," was all he said in answer to me; then he added; "I can't stand this any longer. I tell you we've got to get out of here. You don't know how awful--"

"Yes," said Desiree, looking at me.

"But I can scarcely walk," I objected.

"True," said Harry. "I know. But we can help you. There must be another exit, and we'll start now."

"Very well," I said quite calmly; and I picked up one of the spears which we had carried with us, and, rising to my knees, placed the b.u.t.t of the shaft against the wall near which I lay.

But Harry saw my purpose, and was too quick for me. He sprang across and s.n.a.t.c.hed the spear from my hand and threw it on the ground a dozen feet away.

"Are you crazy?" he shouted angrily.

"No," I answered; "but I am little better, and I doubt if I shall be.

Come--why not? I hinder you and become bored with myself."

"You blame me," he said bitterly; "but I tell you you don't know. Very well--we stay. You must give me your promise not to act the fool."

"In any event, you must go soon," I answered, "or starve to death.

Perhaps in another twenty-four hours I shall be stronger. Come, Desiree; will that satisfy you?"

She did not answer; her back was turned to us as she stood gazing across the stream into the depths of the cavern. There was a curious tenseness in her att.i.tude that made me follow her gaze, and what I saw left me with no wonder at it--a huge, black, indistinct form that moved slowly toward us through the darkness.

Harry caught sight of it at the same moment as myself, and on the instant he turned about, covering his face with his hands, and called to Desiree and me to do likewise.

Desiree obeyed; I had risen to my knees and remained so, gazing straight ahead, ready for a combat if it were not a physical one. I will not say that a certain feeling of dread did not rise in my heart, but I intended to show Desiree and Harry the childishness of their terror.

Nothing could be seen but the uncertain outline of the immense bulk; but the same penetrating, sickening odor that had before all but suffocated me came faintly across the surface of the stream, growing stronger with each second that pa.s.sed. Suddenly the eyes appeared--two glowing orbs of fire that caught my gaze and held it as with a chain.

I did not attempt to avoid it, but returned the gaze with another as steadfast. I was telling myself: "Let us see this trick and play one stronger." My nerves centered throbbingly back of my eyes, and I gave them the whole force of my will.

The thing came closer and the eyes seemed to burn into my very brain.

With a great effort I brought myself back to control, dropping to my hands and knees and gripping the ground for strength.

"This is nothing, this is nothing," I kept saying to myself aloud--until I realized suddenly that my voice had risen almost to a scream, and I locked my teeth tight on my lip.

I no longer returned the gaze from my own power; it held me of itself.

I felt my brain grow curiously numb and every muscle in my body contracted with a pain almost unbearable. Still the thing came closer and closer, and it seemed to me, half dazed as I was, that it advanced much faster than before.

Then suddenly I felt a sensation of cold and moisture on my arms and legs and a pressure against my body, and I realized, as in a dream, that I had entered the stream of water!

I was crawling toward the thing on my hands and knees, without having even been conscious that I had moved.

That brought despair and a last supreme struggle to resist whatever mysterious power it was that dragged me forward.

Cold beads of sweat rolled from my forehead. Beneath the surface of the water my hands gripped the rocks as in a vise. My teeth had sunk deep into my lower lip and covered my chin with blood, though I did not know that till afterward.

But I was pulled loose from my hold, and forward. I bent the whole force of my will to the effort not to move, but my hand left the rock and crept forward. I was fully conscious of what I was doing. I knew that if I could once draw my eyes away from that compelling gaze the spell would be broken, but the power to do so was not in me.

The thing had halted on the farther bank of the stream. Still I moved forward. The water now lapped against my chest; soon it was about my shoulders.

I was fully conscious of the fact that in another ten feet the surface would close over my head, and that I had not the strength to swim or fight the current; but still I went forward. I tried to cry out, but could force no sound through my lips.

Then suddenly the eyes began to disappear. But that at least was comprehensible, for I could distinctly see the black and heavy lids closing over them, like the curtain on a stage. They fell slowly.

The eyes became half moons, then narrowed to a thin slit. I rose, panting like a man exhausted with extreme and prolonged physical exertion.

The eyes were gone.

A mad impulse rushed into my brain to dash forward and touch the monster, to see if that dim, black form were really a thing of flesh and blood or some contrivance of the devil. I smile at that phrase as I write it now in my study, but I did not smile then. I was standing above my knees in the water, trembling from head to foot, divided between the impulse to go forward and the inclination to flee in terror.

I did neither; I stood still. I could see the thing with a fair amount of distinctness and forced my brain to take the record of my eyes. But I could make nothing of it.

I guessed at rather than saw a hideous head rolling from side to side at the end of a long and sinuous neck, and writhing, reptilian coils lashing the rock at the edge of the water, like the tentacles of an octopus, only many times larger. The body itself was larger than that of any animal I had ever seen, and blacker even than the darkness.

Suddenly the huge ma.s.s began to move slowly backward. The sharpness of the odor had ceased with the opening of the eyes, which did not reappear. I could dimly see its huge legs slowly rise and recede and again meet the ground. Soon the thing was barely discernible.

I took a step forward as though to follow; but the strength of the current warned me of the danger of proceeding farther, and, besides, I feared every moment to see the lids again raised from the terrible eyes. The thought attacked my brain with horror, and I turned and fled in a sudden panic to the rear, calling to Harry and Desiree.

They met me at the edge of the stream, and their eyes told me that they read in my face what had happened, though they had seen nothing.

"You--you saw it--" Harry stammered.

I nodded, scarcely able to speak.

"Then--perhaps now--"

"Yes," I interposed. "Let's get out of here. It's horrible. And yet how can we go? I can hardly stand."

But Harry was now the one who argued for delay, saying that our retreat was the safest place we could find, and that we should wait at least until I had had time to recover from the strain of the last half-hour.

Realizing that in my weakened condition I would be a hindrance to them rather than a help, I consented. Besides, if the thing reappeared I could avoid it as Harry and Desiree had done.

"What is it?" Harry asked presently.

We were sitting side by side, well up against the wall. It was an abrupt question, with no apparent pertinence, but I understood.

"Heaven knows!" I answered shortly. I was none too pleased with myself.

"But it must be something. Is it an animal?"