He was thinking clearly, now. And, in the glare of daylight, no longer an unreasoning animal fleeing blindly over a dim-lit foreign sphere, he was unable to understand his panic of the night. Afraid? Of course he had been afraid! What man wouldn't have been at sight of that monstrous thing? But that he, Harley 2Q14N20, should have lost his head completely and gone plunging off into the brush like that, seemed unbelievable. To the depths of his soul he felt ashamed. And to his own soul he made the promise that he would wipe out, in action, that hour of cowardice. As he wound his way through the squat, carmine forest, he tried to figure out the nature of the thing that had crashed balefully after him in the black hours. It had seemed made of rock--a giant, primitive stone statue imbued with life. But it was impossible that it should really be fashioned of rock. At least it ought to be impossible. Rock is inorganic, inanimate. It simply couldn't have the spark of life in it. Harley had seen many strange creations, on many strange planets, but never had he seen inorganic mineral matter endowed with animation. Nor had anyone else. Yet the thing _looked_ as though made of stone. Of some peculiar, quartz-suffused granite--proving that the wan, white-haired man he had talked to in the sanitarium had not been mad at all, but only too terribly sane. The creature's very eyes had had a stony look. Its eyelids had rasped like stone curtains rubbing together. Its awful, two-fingered hands, or claws, had ground together like stones rubbing. Was it akin to the lizards, the cold-blooded life of Earth? Was this rocky exterior merely a horny shell like that of a turtle? No. Horn is horn and rock is rock. The two can't be confused. The only theory Harley could form was that the great beast was in some strange way a link between the animal and the mineral kingdoms. Its skeletal structure, perhaps, was silicate in substance, extending to provide an outside covering that had hardened into actual stone, while forming an interior support to flesh that was half organic, half inorganic matter. Some such silicate construction was to be found in the sponge, of Earth. Could this be a gigantic relative of that lowly creature? He did not know, and couldn't guess. He wasn't a zoologist. All he knew was that the thing appeared to be formed of living, impregnable stone. He knew, also, that this fabulous creature was bent on destroying him. At this point in his reflections, the glint of water came to his eyes between the tree trunks ahead of him. He had come back to the lake. * * * * * For moments he stood behind one of the larger trees on the fringe and searched around the shore for sight of the rock giant. It was nowhere in evidence. Rapidly he advanced from the forest and ran for the Dart. From a distance it appeared to be all right: but as he drew near a cry rose involuntarily to his lips.