"What are'you getting at?" asked Clark. "If he's the same, he's human."

"You take an old spaceship," said Anderson, "and you juice it up. Add a gadget here and another there, eliminate one thing, modify another. What have you got?"

"A rebuilt job," said Clark.

"That's just the phrase I wanted," Anderson told them. "Someone or something has done the same to Sutton. He's a rebuilt job. And the best human job I have ever seen. He's got two hearts and his nervous system's haywire…well, not haywire exactly, but different. Certainly not human. And he's got an extra circulatory system. Not a circulatory system, either, but that is what it looks like. Only it's not connected with the heart. Right now, I'd say, it's not being used. Like a spare system. One system starts acting up and you can switch to the spare one while you tinker up the first."

Anderson pocketed his pipe, rubbed his hands together almost as if he were washing them.

"Well, there," he said, "you have it."

Blackburn blurted out, "It sounds impossible."

Anderson appeared not to have heard him, and yet he answered him. "We had Sutton under for the best part of an hour and we put every inch of him on tape and film. It takes some time to analyze a job like that. We aren't finished yet.

"But we failed in one thing. We used a psychonometer and we didn't get a nibble. Not a quaver, not a thought. Not even seepage. His mind was closed, tight shut."

"Some defect in the meter," Adams suggested.