Succeeding generations have been kept almost absolutely clean. The lamps supply ultraviolet, the air is recycled ... well, in principle it's no different from an ecological-unit spaceship." Radek shook his head. He could scarcely get the words out: "People? Humans?" "For the past 120 years. Wasn't hard to get germ plasm and grow it. The first generation reproduced normally, the second could if lack of space didn't force us to load their food with chemical contraceptive." Behind his faceplate, Lang grimaced. "I'd never have allowed it if I'd been director at the time, but now I'm stuck with the situation. The legality is very doubtful. How badly do you violate a man's civil rights when you keep him a prisoner but give him immortality?" He opened the door, an archaic manual type. "We can't do better for them than this," he said. "The volume of space we can enclose in a magnetic field of the necessary strength is already at an absolute maximum." Light sprang automatically from the ceiling. Radek looked in at a dormitory. It was well-kept, the furniture ornamental. Beyond it he could see other rooms ... recreation, he supposed vaguely. The score of hulks in the beds hardly moved. Only one woke up. He blinked, yawned, and shuffled toward the visitors, quite nude, his long hair tangled across the low forehead, a loose grin on the mouth. "Hello, Bill," said Lang. "Uh ... got sumpin? Got sumpin for Bill?" A hand reached out, begging. Radek thought of a trained ape he had once seen. "This is Bill." Lang spoke softly, as if afraid his voice would snap. "Our oldest inhabitant. One hundred and nineteen years old, and he has the physique of a man of 20. They mature, you know, reach their peak and never fall below it again." "Got sumpin, doc, huh?" "I'm sorry, Bill," said Lang. "I'll bring you some candy next time." The moron gave an animal sigh and shambled back. On the way, he passed a sleeping woman, and edged toward her with a grunt. Lang closed the door. There was another stillness.