Something suddenly struck me in the left arm and stuck there; I shook it loose impatiently and it felt as though my arm went with it.

I did not care to glance up even for an instant; they were pressing me closer and closer; but I knew that they had begun to hurl their spears at me from the water, and that the game was up. Another struck me on the leg; soon they were falling thick about me.

Calling to Harry to follow, I turned and ran for the opening in the rock to which I had led Desiree. In an instant he had joined me.

By that time scores of the Incas had scrambled out of the water onto the ledge and started toward us, and as many more came rushing through the crevice, finding their way no longer contested.

Harry carried three spears. I had four. We sprang up a lane encircling the rock to the rear and at its top found Desiree.

A projecting bit of rock gave us some protection from the spears that were being hurled at us from below, but they came uncomfortably close, and black forms began to appear in the lane through which we had come.

Harry shouted something which I didn't hear, and, taking Desiree in his arms, sprang from the rock to another ledge some ten feet below.

I followed. At the bottom he stumbled and fell, but I helped him to his feet and then turned barely in time to beat back three or four of the Incas who had tumbled down almost on our very heads.

Immediately in front of us was a chasm several feet across. Harry cried to Desiree, "Can you make it?" and she shook her head, pointing to her injured foot.

"To me!" I shouted desperately; they were coming down from above despite my efforts to hold them back.

Then, in answer to a call from Harry, I turned and leaped across the chasm, throwing the spears ahead of me. Harry took Desiree in his arms and swung her far out; I braced myself for the shock and caught her on my feet.

I set her down unhurt, and a minute later Harry had joined us and we were scrambling up the face of a boulder nearly perpendicular, while the spears fell thick around us.

Desiree lost her footing and fell against Harry, who rolled to the bottom, pawing for a hold. I turned, but he shouted: "Go on; I'll make it!" Soon he was again at my side, and in another minute we had gained the top of the boulder, quite flat and some twenty feet square. We commanded Desiree to lie flat on the ground to avoid the spears from below, and paused for a breath and a survey of the situation.

It can be described only with the word chaotic.

The light of the urns were now hidden from us, and we were in comparative darkness, though we could see with a fair amount of clearness. Nothing could be made of the ma.s.s of boulders, but we knew that somewhere beyond them was the pa.s.sage from the cavern which we sought.

The Incas came leaping across the chasm to the foot of the rock.

Several of them scrambled up the steep surface, but with our spears we pushed them back and they tumbled onto the heads of their fellows below.

But we were too exposed for a stand there, and I shouted to Harry to take Desiree down the other side of the rock while I stayed behind to hold them off. He left me, and in a moment later I heard his voice crying to me to follow. I did so, sliding down the face of the rock feet first.

Then began a wild and desperate scramble for safety, with the Incas ever at our heels. Without Desiree we would have made our goal with little difficulty, but half of the time we had to carry her.

Several times Harry hurled her bodily across a chasm or a crevice, while I received her on the other side.

Often I covered the retreat, holding the Incas at bay while Harry a.s.sisted Desiree up the steep face of a boulder or across a narrow ledge. There was less danger now from their spears, protected as we were by the maze of rocks, but I was already bleeding in a dozen places on my legs and arms and body, and Harry was in no better case.

Suddenly I saw ahead of us an opening which I thought I recognized. I pointed it out to Harry.

"The exit!" he cried out, and made for it with Desiree. But they were brought to a halt by a cliff at their very feet, no less than twenty feet high.

I started to join them, but hearing a clatter behind, turned just in time to see a score of Incas rush at us from the left, through a narrow lane that led to the edge of the cliff.

I sprang toward them, calling to Harry for a.s.sistance. He was at my side in an instant, and together we held them back.

In five minutes the mouth of the lane was choked with their bodies; some behind attempted to scramble over the pile to get at us, but we made them sick of their job. I saw that Harry could hold it alone then, and calling to him to stand firm till I called, I ran to Desiree.

I let myself over the edge of the cliff and hung by my hands, then dropped to the ground below. It was even further than I had thought; my legs doubled up under me and I toppled over, half fainting.

I gritted my teeth and struggled to my feet, calling to Desiree. She was already hanging to the edge of the cliff, many feet above me. But there was nothing else for it, and I shouted: "All right, come on!"

She came, and knocked me flat on my back. I had tried to catch her, and did succeed in breaking her fall, at no little cost to myself. I was one ma.s.s of bruises and wounds. But again I struggled to my feet and shouted at the top of my voice:

"Harry! Come!"

He did not come alone. I suppose the instant he left the lane unguarded the Incas poured in after him. They followed him over the edge of the cliff, tumbling on top of each other in an indistinguishable ma.s.s.

Some rose to their feet; their comrades, descending from above, promptly knocked them flat on their backs.

Harry and Desiree and I were making for the exit, which was not but a few feet away. As I have said, the thing was choked up till it was almost impa.s.sable. We squeezed in between two rocks, with Desiree between us. Harry was in front, and I brought up the rear.

Once through that lane and we might hold our own.

"In Heaven's name, come on!" Harry shouted suddenly; for I had turned and halted, gazing back at the Incas tumbling over the cliff and rushing toward the mouth of the exit.

But I did not heed him, for, standing on the top of the cliff, waving his arms wildly at those below, I had seen the form of the Inca king.

He was less than thirty feet away.

With cries from Harry and Desiree ringing in my ears, I braced my feet as firmly as possible on the uneven rock and poised my spear above my head. The Incas saw my purpose and stopped short.

The king must also have seen me, but he stood absolutely motionless. I lunged forward; the spear left my hand and flew straight for his breast.

But it failed to reach the mark. A shout of triumph was on my lips, but was suddenly cut short when an Inca standing near the king sprang forward and hurled himself in the path of the spear just as its point was ready to take our revenge. The Inca fell to the foot of the cliff with the spear buried deep in his side. The king stood as he had before, without moving.

Then there was a wild rush into the mouth of the exit, and I turned to follow Harry and Desiree. With extreme difficulty we scrambled forward over the rocks and around them.

Desiree's breath was coming in painful gasps, and we had to support her on either side. The Incas approached closer at our rear; I felt one of them grasp me from behind, and in an excess of fury I shook him off and dashed him backward against the rocks. We were able to make little headway, or none; by taking to the exit we appeared to have set our own death-trap.

Harry went on with Desiree, and I stayed behind in the attempt to check the attack. They came at me from both sides. I was faint and bleeding, and barely able to wield my spear--my last one. I gave way by inches, retreating backward step by step, fighting with the very end of my strength.

Suddenly Harry's voice came, shouting that they had reached the end of the pa.s.sage. I turned then and sprang desperately from rock to rock after them, with the Incas crowding close after me.

I stumbled and nearly fell, but recovered my footing and staggered on.

And suddenly the ma.s.s of rocks ended abruptly, and I fell forward onto flat, level ground by the side of Desiree and Harry.

"Your spear!" I gasped. "Quick--they are upon us!"

But they grasped my arms and dragged me away from the pa.s.sage to one side. I was half fainting from exhaustion and loss of blood, and scarcely knew what they did. They laid me on the ground and bent over me.

"The Incas!" I gasped.

"They are gone," Harry answered.

At that I struggled to rise and rested my body on my elbows, gazing at the mouth of the pa.s.sage. It was so; the Incas were not to be seen!

Not one had issued from the pa.s.sage.