It was Kayin who ran for him first, digging frantically away at the smothering mass, without regard for the fragments that continued to rain down upon him. And after he had reached the man, who was unconscious, but still breathing, it was Kayin who had wondered why on this Earth he had taken the risk for the sake of a creature who meant so little to him. There was another risk as well, he found, when they summoned a doctor to treat the injured man, and someone suggested that Kayin had been injured too. But Kayin quickly shrugged off the idea that he needed treatment, and went back at once to his work. He wanted no doctor discovering what unusual arms and legs and internal organs he had. In the days that followed he continued to wonder at himself. Working together with these men, he had changed. But he must be careful, he knew, not to change too far. They had only, he was certain, to see him as he was, to realize his difference from them, and their friendliness would change to hate, causing them to turn from him with fear and loathing. The building had reached the stage of scaffolding, and he was still at work. It was now that he learned the full truth about the project which was soon to come into operation. He was on the outside of the building, and two of the men in charge were nearby. One of them, shrewd and elderly, had financed the building. The other, in his thirties, was the scientist who had invented the process. They were speaking in low tones, tones which no human being standing in Kayin’s position would have been able to understand. “You’re sure, Blayson, that there’s no danger?” the older man was saying. The scientist smiled. “There’s always some danger, Mr. Lymer, especially when you try something new. But there’s nothing we shouldn’t be able to control.” “I still don’t think that you know too much about what you’re doing.” “I’ve admitted that myself. But we get results, don’t we? We’ll corner the world market, Mr. Lymer. Name your antibiotic and we’ll make it. And in addition to anything now being sold, we’ll have dozens that nobody has even imagined. I think I’ve given you enough evidence to convince you of that.” “I suppose you have. But this use of cosmic rays makes me uneasy. You still don’t know enough about them.” It was at this point that Kayin’s third and fourth eyes, usually so completely concealed, popped wide open in surprise and terror. It was fortunate that no one took the trouble to look at him at that moment. The younger man was saying confidently, “We’ll control them. All we need to know is that they’re high energy, higher than anything we can produce here on Earth, and that we can concentrate them in a way no one else can. There’s nothing to fear, nothing that ordinary precautions shouldn’t enable us to handle.”