"In my office," the dying Frane gasped faintly. "There were three cylinders." Loto and several of the chemists ran in. It seemed an eternity of waiting, with Nixon's mind picturing his enlarging adversary out there in the other valley. But it was only a moment before Loto and the chemists came back. The drug-cylinders were gone! Tork had made away with them all! Nixon turned and ran for the pass. That damnable delay! He cursed himself for having waited to try and get the drug! Tork by now might already be too big to handle.... The broad valley beyond the pass lay shining in the moonlight. The lines of trees and the little orange river were off to the left. For a moment Nixon stood peering. Was Tork here? Evidently the Orites who lived here had seen him. Their tiny cries sounded. Nixon could see terrified groups of them running. Then the figure of Tork suddenly rose up from a rock-cluster on the other side of the little river. He had been crouching behind a line of trees. Now with a cry of triumph he straightened, bounded over the river. He was about Nixon's size. He shouted, "Not a giant any more, are you? Well, this is the end of you, Earthman!" Tork was holding a dripping chunk of rock which he had seized from the river bank. He flung it, but Nixon ducked. The rock went thudding out across the valley. Then as Nixon held his ground, crouching, Tork's body struck him. The impact knocked Nixon backward, so that he fell with Tork on top of him. It startled him; he had not realized that Tork's body would be so solid, far heavier now than Nixon's. Then they were rolling, locked together, jabbing, pummeling. In a rough and tumble, Nixon had always been very handy. He was exceedingly agile, and now the heavier Tork could not hold him. In a moment Nixon was up. He found himself at the edge of the babbling little stream. He seized a tree. It was thick, half as big as himself. Desperately he wrenched it up. The knob of heavy roots made it like a maul, a bludgeon. Tork was scrambling up. Nixon hit him with a swing of the tree root. He staggered, went down, this time with Nixon on top of him. [Illustration: _He wrenched up a tree and swung it._] But now Nixon realized that Tork was a full head taller. As they struggled, with Tork heaving up, trying to ward off Nixon's blows, Nixon could feel his antagonist's body expanding. It was gruesome. It shot a fear through Nixon. If he didn't kill Tork now in a moment or two, he never would! And Tork knew it. He was fighting on the defensive, just waiting until Nixon would be only a stripling in his grip.