Personal! Marie Baker, Age 27, weight 114, brunette, brown eyes, minute scar on left thigh. Social Security Number 340-01-6077 please contact— "I don't want her!" stormed Peter. "The advertisement says you do," cooed Joan. "Now look, Joan—" She laughed and laid a cool hand on his cheek affectionately. "I know you don't. But I did want to point out that your—grandson—is wasting no time." Another voice interrupted. "Naturally not," interjected Hedgerly. "After all, I'm here to see that things do go according to history." "History be damned," snapped Peter. "I—" "Really have very little to say about it," smiled Hedgerly. "You'll do exactly as ... as you did!" "Then," blazed Peter, "why not let nature take its course? If I'm to meet and commit matrimony with this Baker dame, I'll do it!" For the first time, Hedgerly looked less than the complete master of everything he surveyed. "It is also historic fact," he said in a sepulchral tone, "that I add my efforts to make history satisfy itself. You see," he said, brightening, "how it all comes out!" He dug into an inside pocket and came up with a wallet. From it he extracted a newspaper clipping yellow and brittle with age. "Here is the original. I just copied it for the advertisement." Peter took the aged clipping and read it. His hands shook and the clipping fell apart. "No matter," smiled Hedgerly. "Its job is done." "Is done?" demanded Peter. "Of course. Marie Baker will be at your apartment this evening." "I'll scratch her bald-headed," threatened Joan. Hedgerly shook his head. "No, you won't," he said positively. Then he looked down at Peter and his eyes ran over the experimental setup. "It won't work," he said to Peter. "You're on the wrong track. It is impossible to accelerate and focus and direct the neutron. The neutron, possessing no charge, is therefore unaffected by either magnetic or electrostatic fields." Peter looked up quietly. "I've evidence to the contrary," he said. "We