The pip crossed the red line—and vanished.

Only the smooth green trace remained, motionless and without meaning.

With hesitant shuffling of feet, the circle expanded. The men glanced uncertainly at one another.

One said, "Well, that's the end of Dell. We'll soon know now if we're on the right track, or if we've botched it. Carlson will call when he's computed it."

"The end of Dell?" Curt repeated slowly, as if trying to convince himself of what he knew had happened. "The pip on the screen—that showed his life leaving him?"

"Yes," said Sark. "He knew he had to go. And there are perhaps hundreds more like him. But Dell couldn't have told you of that—"

"What will we do with him?" Brown asked abruptly.

"If Dell is dead, you murdered him!" Curt shouted.

A rising personal fear grew within him. They could not release him now, even though his story would make no sense to anybody. But they had somehow killed Dell, or thought they had, and they wouldn't hesitate to kill Curt. He thought of Louise in the great house with the corpse of Haman Dell—if, of course, he was actually dead. But that was nonsense....

"Dell must have sent you to us!" Sark said, as if a great mystery had suddenly been lifted from his mind. "He did not have time to tell you everything. Did he tell you to take the road behind the farm?"