On and on.

"Let's go over the description of that machine again. Did you ever see this Fierut disassemble any part of it?"

Walt was limp and exhausted. His mind was dulled by the effort of concentrating continuously. "Yes." "No." "To understand that...." "I don't know." "No, no more than that.... Please. I'm getting confused."

"You've been very helpful, Mr. Johnson," the lieutenant said. "Gentlemen, I'm afraid he's getting a little tired. Shall we postpone further questioning?"

"I believe we better. Would you call in Dr. Norvel, please."

Walt slumped down in his seat.

The conferees whispered among themselves and compared notes.

Julia and the doctor came back.

"It took longer than I thought," Dr. Norvel said. "I had to teach her quite a bit of math."

"What's your opinion?" the bald civilian asked.