Meanwhile, his relations with the people among whom he worked became almost human. They greeted him every day as one of themselves, asked casual questions about the place from which he had come and the way he had lived, and accepted the answers as if with a quiet confidence that he was telling the truth. Once, in an access of good feeling, one of them had gone so far as to slap him amicably on the shoulder, and Kayin had experienced agony such as he had never felt before. But he managed to conceal the pain, and even to laugh weakly. He made sure, however, that a similar incident would never happen again. Whenever someone approached him too closely, he opened his extra eyes very slightly, ready to step aside at the touch of a too friendly hand.

He had not realized how much his own attitude toward them had changed until the day an accident occurred. A large shelf of rock had unexpectedly turned up to block the excavation of a wide pit, and it had been necessary to shatter it with dynamite. But the explosive did not at first go off, and one of the men had gone back to see what was wrong. He had been just in time to be knocked down by the blast itself, and to be covered by the mass of dirt and broken rock that slid into the excavation.

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.”