Conger listened dimly.

"Do you think you have it all now?" the Speaker asked.

"Yes. I think so." Conger entered the crystal cage and sat down, placing his hands on the wheel.

"Good luck," the Speaker said.

"We'll be awaiting the outcome. There's some philosophical doubt as to whether one can alter the past. This should answer the question once and for all."

Conger fingered the controls of the cage.

"By the way," the Speaker said. "Don't try to use this cage for purposes not anticipated in your job. We have a constant trace on it. If we want it back, we can get it back. Good luck."

Conger said nothing. The cage was sealed. He raised his finger and touched the wheel control. He turned the wheel carefully.

He was still staring at the plastic bag when the room outside vanished.

For a long time there was nothing at all. Nothing beyond the crystal mesh of the cage. Thoughts rushed through Conger's mind, helter-skelter. How would he know the man? How could he be certain, in advance? What had he looked like? What was his name? How had he acted, before he spoke? Would he be an ordinary person, or some strange outlandish crank?