The commander got up, retrieving the weapon. He aimed it at the retreating figure and would have triggered it except that it didn't feel right in his hand. He lowered it and quickly examined the damaged mechanism. Sweating, he slipped it gingerly into a tunic pocket. Muffled shouts were coming from Cameron's office, growing in vehemence. The general broke in. The medicouncilor glared at him from the screen. "I see that you let him get away." The disheveled officer straightened his uniform. "I'm sorry, sir. I didn't think he had that much life in him. I'll alert the guards immediately." "Never mind now. Revive that man." The general wasn't accustomed to resuscitation; saving lives was out of his line. Nevertheless in a few minutes Cameron was conscious, though somewhat dazed. "Now, doctor, who does know something about the gravity drive if it isn't Docchi?" Cameron shook his head groggily. "It was an easy mistake," he said. "Cut off from communication with us the drive began to work. How, why, who did it? Mostly who. Not me, I'm a doctor, not a physicist. Nor Jordan; he's at best a mechanic. Therefore it had to be Docchi because he's an engineer." He stopped to wipe the blood from his cheek. "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. "Yes, by God, I do think." The medicouncilor's fist crashed down. "Docchi knows why. He found out in this room and we told him. As soon as he knew he escaped."