Wilson's voice came out of the screen, a frantic, almost terrified voice.

"I've told you all I know. I'm not a scientist. I'm a mechanic. I've told you what they're doing. I can't tell you how they do it."

Arnold Grant leaned forward in his chair. His face was twisted in fury.

"There were plans, weren't there?" he demanded. "There were equations and formulas. Why didn't you bring us some of them?"

Spencer Chambers raised a hand from the desk, waved it toward Grant. "The man has told us all he knows. Obviously, he can't be any more help to us."

"You told him to go back and see if he couldn't find something else, didn't you?" asked Grant.

"Yes, I did," Chambers told him. "But apparently he couldn't find it."

"I tried," pleaded Wilson. Perspiration stood out on his forehead. The cigarette in his mouth was limp and dead. "One of them was always there. I never could get hold of any papers. I asked questions, but they were too busy to answer. And I couldn't ask too much, because then they would have suspected me."

"No, you couldn't do that," commented Craven with an open sneer.