Harry called to him and there was no answer. And he cried out and he cursed and he paced his cell and he walked alone in the courtyard and he begged the impassive guards for information, and he sweated and he talked to himself and he counted the days and he lost count of the days. Then, all at once, there was another prisoner in the adjacent cell, and his name was William Chang, and he was a biologist. He was reticent about the crime he had committed, but quite voluble about the crimes committed by others in the world outside. Much of what he said, about genes and chromosomes and recessive characteristics and mutation, seemed incomprehensible to Harry. But in their talks, one thing emerged clearly enough--Chang was concerned for the future of the race. "Leffingwell should have waited," he said. "It's the _second_ generation that will be important. As I tried to tell my people--" "Is that why you're here?" Chang sighed. "I suppose so. They wouldn't listen, of course. Overpopulation has always been the curse of Asia, and this seemed to be such an obvious solution. But who knows? The time may come when they need men like myself." "So you were stockpiled too." "What's that?" Harry told him about Richard Wade's remarks, and together they tried to puzzle out the theory behind them. But not for long. Because once again Harry Collins awoke in the morning to find the adjoining cell empty, and once again he was alone for a long time. At last a new neighbor came. His name was Lars Neilstrom. Neilstrom talked to him of ships and shoes and sealing-wax and the thousand and one things men will discuss in their loneliness and frustration, including--inevitably--their reasons for being here. Neilstrom had been an instructor under Vocational Apt, and he was at a loss to explain his presence at Stark Falls. When Harry spoke of the stockpiling theory, his fellow-prisoner demurred. "It's more like Kafka than science fiction," he said. "But then, I don't suppose you've ever read any Kafka." "Yes, I have," Harry told him. "Since I came here I've done nothing but read old books. Lately they've been giving me microscans. I've been studying up on biology and genetics; talking to Chang got me interested. In fact, I'm really going in for self-education. There's nothing else to do." "Self-education! That's the only method left nowadays." Neilstrom sounded bitter. "I don't know what's going to become of our heritage of knowledge in the future. I'm not speaking of technological skill; so-called scientific information is carefully preserved. But the humanities are virtually lost. The concept of the well-rounded individual is forgotten. And when I think of the crisis to come--" "What crisis?"