"Yes. His rhesus monkeys show the same decline during the fourth generation, and on to extinction."

"It isn't just like that," David said. "He had to discontinue his work last year—no funds. So we don't know the life expectancies of the later strains. But the decline starts in the third clone generation, a decline of potency. He was breeding each clone generation sexually, testing the offspring for normalcy. The third clone generation had only twenty-five percent potency. The sexually reproduced offspring started with that same percentage, and, in fact, potency dropped until the fifth generation of sexually reproduced offspring, and then it started to climb back up and presumably would have reached normalcy again."

Walt was watching him closely, nodding now and then. David went on. "That was the clone-three strain. With the clone-four strain there was a drastic change. Some abnormalities were present, and life expectancy was down seventeen percent. The abnormals were all sterile. Potency was generally down to forty-eight percent. It was downhill all the way with each sexually reproduced generation. By the fifth generation no offspring survived longer than an hour or two. So much for clone-four strain. Cloning the fours was worse. Clone-five strain had gross abnormalities, and they were all sterile. Life-expectancy figures were not completed. There was no clone-six strain. None survived."

"A dead end," Walt said. He indicated a stack of magazines and extracts. "I had hoped that they were out of date, that there were newer methods, perhaps, or an error had been found in their figures. It's the third generation that is the turning point then?"

David shrugged. "My information could be out of date. I know Vlasic stopped last year, but Semple and Frerrer are still at it, or were last month. They may have something newer than I know. You're thinking of livestock?"

"Of course. You know the rumors? They're just not breeding well. No figures are available, but, hell, we have our own livestock. They're down by half."

"I heard something. Denied by the Bureau of Information, I believe."

"It's true," Walt said soberly.

"They must be working on this line," David said. "Someone must be working on it."

"If they are, no one's telling us about it," Walt said. He laughed bitterly and stood up.

"Can you get materials for the hospital?" David asked.

"For now. We're rushing it like there's no tomorrow, naturally. And we're not worrying about money right now. We'll have things that we won't know what to do with, but I thought it would be better to order everything I can think of than to find out next year that what we really need isn't available."