that there was a spring only a hundred yards from the house. She learned that there was a very small town only four or five miles away. She was content. So Bud Gregory's family unloaded pots, pans, bedding, two hound dogs, certain folding cots and assorted gunnysacks of provisions and canned goods from the car. They moved in. There were berries and woods-greens for the girls to pick nearby, there were rabbits to snare and fish to catch for the boys and nobody was likely to try to make anybody go to school. Bud Gregory's family was happy. As the sun went down, with the ancient and decrepit jalopy standing forlornly beside the really quite unspeakable shack, Bud Gregory sat comfortably on the sagging doorstep and leaned back against the rotting side-wall. He reflected complacently that nobody was likely to bother him here for a long time to come. He could sit in the sun and not be bothered. In a very real sense he was the greatest physicist yet known on earth. He had the greatest command over subatomic particles of any human being so far born. His profession was the repair of hopelessly disarranged automobiles but his occupation, his avocation and his only desire was simply to sit and do nothing. Sometimes, though, he liked to drink a little beer. On August 9th, the background-count of standard Geiger-Miller tubes was up to 3-5 per minute per square centimeter as far east as St. Louis. On the Coast it was up to 5-7. On August 10th, the count was 3-5 in the Atlantic States, 5-7 in the center of the country and 7-9 on the Pacific Coast.... There was another small fishing-boat ploughing its way through the long slow mid-Pacific swells, towing an odd object which was supported by floats. There had been another one before it and another before that. Like its fellows which had made these strange patrols, towing lead-sheathed torpedo-shaped objects, this fishing-boat also never seemed to fish—Not even when there were very plain evidences of tuna in profitable quantities all about. The boat forged ahead, its radar flickering about the horizon. Suddenly the movement of the radar-antenna ceased. It remained fixed in one position and one position only. Then, as suddenly, men ran about the boat's deck. They hastily assembled machine-guns at the stern. There were sharp, tearing noises above the droning hum of the Diesel engine. Tiny puffs of smoke were torn away from the muzzles of the