"Indefinitely."
Donovan breathed deeply. "Immortality!"
Blascomb did not smile. "Only if the C.D. does not find you. Unlicensed rejuvenation is punishable by execution in an extremely painful manner. You're a doomed man now if the C.D. even finds you. The worst tortures of the Middle Ages would be nothing compared to what Crane would do to you or me if he tracks us down."
"You can stay in the present time-cycle," Donovan said, "but I'm tired of control and supervision. Send me to some period where an individual had a chance to work and live without state control. Give me the times of individualism!"
"C.D. agents are everywhere in the time-cycles, tracking down illegal immigrants. Quite a number of the men I've rejuvenated chose the Renaissance for escape, but I'm afraid that a good part of that cycle's carnage was the work of such C.D. agents as our friend Crane. I'd recommend another period."
"The Golden Age of Greece?"
Blascomb shook his head. "Already taken. Aristotle, Plato, and a few others are 25th century men. Archimedes was murdered by a C.D. agent, and Socrates sent to his death by a group of them."
"Their fates were known to history—why did those men leave the 25th century to live in that cycle?"
He shrugged his shoulders. "They probably felt that the few years of extra life were worth it. Well, into what period do you want to go and what would you do there?"
"I do not understand the paradoxes," Donovan said, "What if I chose to build gravity-deflectors in Ancient Rome?"