Trevor knew they must have reached the pass, for on both sides now there rose up slopes that had never been touched by wind or rain or living root. He staggered on, and presently the ground began to drop and the way was easier. They had passed the crest. And the oxygen was almost gone. Downward now, stumbling, slipping, sliding, yearning toward the air below. And they were on the other side of the mountain, above the plain of rock that led to.... And then, at last, Shannach--laughed. "Clever," he said. "Oh, very clever, to escape without a ship! But you will come back, with a ship, and you will take me to the outside world. And I will reward you greatly." "No," said Trevor, in his mind. "No, Shannach. If we make it, the sun-stone comes out, and we'll come back for the slaves, not for you!" "No, Trevor." The gentle finality of that denial was coldly frightening. "You are mine now. You surprised and tricked me once, but I know the trick now. Your whole mind is open to me. You cannot withstand me ever again." It was cold, cold in the darkness below the pass, and the chill went deep into Trevor's soul and froze it. Saul and Jen were below him now, stumbling down along the rock-strewn lip of a chasm, into the thin high reaches of the air, into sound and life again. He saw them tear away their helmets. He followed them, pulling off his own, gasping the frigid breath into his starved lungs. Shannach said softly, "We do not need them any longer. They would be a danger when you reach other men. Dispose of them, Trevor." Trevor started a raging refusal, and then his mind was gripped as by a great hand, shaken and turned and changed. And his fury flowed away into blankness. "_But of course_," he thought. "_There are many boulders, and I can topple them into the chasm so easily...._" He started toward a jagged stone mass, one that would quite neatly brush the two clumsy figures below him into the abyss. "That is the way, Trevor! But quickly--!" Trevor knew that Shannach had spoken truth, and that this time he was conquered. "No, I won't!" he cried to himself, but it was only a weak echo from a fading will-power, a dying self. "You will, Trevor! And now! They suspect." Saul and Jen had turned. Trevor's face, open now to the numbing cold which he could scarcely feel, must have told them everything. They started scrambling back up toward him. Only a short distance, but they would be too late. Trevor shrieked thinly, "Look out--Shannach...!" He had his hands on it now, on the boulder he must roll to crush them. But there was another way! He was Shannach's while he lived, but there was a way to avoid again betraying Jen's people, and that way was to live no longer. He used the last of his dying will to pitch himself toward the brink of the chasm. Hundreds of feet below a man could lie quiet on the rocks through all eternity. "Trevor, no! No!"