"For God's sake tell me," said Thorton. "It couldn't be——"

"No," said Cameron with quiet satisfaction. "It wasn't Anti either. The last person you'd think of. The little deaf and dumb girl the psychologists wouldn't bother with."

"Nona?" said Thorton incredulously.

"I told you," said Cameron and proceeded to tell him more, filling in the details.

"I see. We overlooked that possibility," said the medicouncilor gravely. "Not the mechanical genius of an engineer. Instead the strange telepathic sense of a girl. That puts the problem in a different light."

"It's not so difficult though." Cameron rubbed the lump on the back of his head. The hair was bristling, clotted with blood. "She can't tell us how she does it. We'll have to find out by experiment, but it won't involve any danger. The monitor can always control the drive."

The medicouncilor laughed shakily, teetering backward. "The monitor is worth exactly nothing. We tried it. For a microsecond it seemed to take over as it always has on other units—but this gravity generator slipped away. We thought Docchi found a way to disengage the control circuit."

"But it wasn't Docchi who told the computer how to do it."

"We figured it out when we thought it was Docchi," growled the medicouncilor wearily. "He was sensible, that's all. It was the only reasonable thing a man could do, come back and take advantage of his discovery." He shook his head in perplexed disgust. "Why the girl returned is beyond me."

"Do you think——" said Cameron and then wished he'd left it unsaid.