Keller, the instrument man, had listened with cheerful interest and without speaking a word. Now he made an indefinite noise and looked inquiringly at Burke. Burke said, explanatorily, "The shaft seems to be either on or off--either a magnet that doesn't quite magnetize, or something that's hell on wheels. It flew thirty miles without enough power supplied to it to make it quiver. That power came from somewhere. I think there's a clue in the fact that it froze everything around where it landed, in spite of traveling fast enough to heat up from air-friction alone. I've got some ideas about it." Keller nodded. Then he said urgently, "Broadcast?" Burke frowned, and turned to Sandy. "That's part of the broadcast from space that changes--is it still changing?" "Still changing," said Sandy. "I didn't think to ask you to keep a check on that. Thanks for thinking of it, Sandy. Maybe someday I can make up to you for what you've been going through." "I doubt it very much," said Sandy grimly. "I'll call the reporter back." She waited for them to leave. When they'd gone, she moved purposefully toward the telephone. Pam said, "Did you hear that growl when I said I'd go to the movies with somebody else? I'm having fun, Sandy!" "I'm not," said Sandy. "You're too efficient," the younger sister said candidly. "You're indispensable. Burke couldn't begin to be able to put this thing through without you. And that's the trouble. You should be irresistible instead of essential." "Not with Joe," said Sandy bitterly. She picked up the telephone to call the newspaper. Pam looked very, very reflective. There was a large deep pit close by the plaster mould when the reporter came next afternoon. A local rigger had come a little earlier and was still there, estimating the cost for lifting up the contents of the mould and lowering it precisely in place to be buried as a bomb shelter under test should be. It was a fortunate coincidence, because the reporter brought two other men who he said were civilian defense officials. They had come to comment on the quality of the bomb shelter under development. It was not too convincing a statement. When they left, Burke was not happy. They knew too much about the materials and equipment he'd ordered. One man had let slip the fact that he knew about the very expensive computer Burke had bought. It could have no conceivable use in a bomb shelter. Both men painstakingly left it to Burke to mention the thirty-mile flight of a bronze object which arrived coated with frost of such utter frigidity that it appeared to be liquid-air snow instead of water-ice. Burke did not mention it. He was excessively uneasy when the reporter's car took them away. He went into the office. Pam was in the midst of a fit of the giggles.