“Ironic that we have a greater obligation to maintain this world as nearly intact as possible than does the species that evolved on it,” Kirel said. “Of course, the Tosevites are not aware our colonization fleet is on the way behind us.”

“Indeed,” Atvar said. “If it arrives and finds Tosev 3 uninhabitable, we will have failed here, no matter what else we accomplish.”

“We also have to bear in mind that the Big Uglies are engaging in nuclear weapons research of their own, certainly with the material their guerrillas captured from us in the SSSR and, the evidence would suggest, with projects altogether their own as well,” Kirel said. “Should one of those projects succeed, our problems here will become measurably more difficult.”

“Immeasurably, you mean,” Atvar said. The Big Uglies would not worry about what they did to Tosev 3, as long as that meant getting rid of the Race. “Deutschland, the SSSR, the United States, maybe those little island empires, too-Nippon and Britain-we have to keep both eye turrets on every one of them. The trouble is, a planet is a very large place. Their projects will not be easy to track down. But it must be done.” He spoke as much to remind himself as to tell Kirel.

“It shall be done,” the shiplord echoed loyally.

It had better be done, they thought together.

The horse-drawn wagon pulled to a stop in New Salem, North Dakota. Sam Yeager looked around. As a seventeen-year veteran of bush-league baseball and its endless travel, he was a connoisseur of small towns. New Salem might have had a thousand people in it; then again, it might not.

He scrambled out of the wagon. Barbara Larssen handed him his Springfield. He took the rifle, slung it over his shoulder, then held out a hand to help Barbara down. They clung to each other for a moment. He kissed the top of her head. The ends of her dark blond hair still showed traces of permanent wave. Most of it was straight, though; a long time had gone by since she’d got a permanent.