He reached out and took one of her hands in his own. She could feel the emotion within him, the tightening and trembling of his big, hard-muscled arm.

Ashby was watching. Over the private communication system that linked them he murmured, "Cry, Bonnie! Make it real. Make him hate himself and everything he's done since he decided to become a colonist—if you can! This is where we've got to find out whether he can crack or not—and why."

"You can't break him," said Bonnie. "He's the strongest man I've ever known. If you find his breaking point it will be when you destroy him utterly. You've got to quit before you reach that point!"

"All that we've done will be useless if we quit now, Bonnie. Just a few more hours and then it will all be over—"

As if his words had touched a hidden trigger, she did begin to cry with a deep but almost inaudible sound and a heavy movement of her shoulders. Mark Jorden put his arm about her as if to force away her grief.

"I know, Bonnie," said Ashby softly. "I can see in your face what's happened to you. It's going to be all right. Everything doesn't end for you when the test is over."

"Oh, shut up!" said Bonnie in a sudden rage that made her tears come faster. "If I ever work on another of your damned experiments it will be when I've lost my senses entirely! You don't know what this does to people. I didn't know either—because I didn't care. But now I know—"

"You know that no harm results after we've erased and corrected all inadequate reactions at the end of the test. You're letting your feelings cover up your full awareness of what we're doing."

"Yes, and I suppose that when it's over I had better submit to a little erasing myself. Then Bonnie can go back to work as a little iced steel probe for some more of your guinea pigs!"

"Bonnie—!"