"Damn!" said Guy Burckhardt. "Fuse?" His wife shrugged sleepily. "Let it go till the morning, dear." Burckhardt shook his head. "You go back to bed. I'll be right along." It wasn't so much that he cared about fixing the fuse, but he was too restless for sleep. He disconnected the bad switch with a screwdriver, stumbled down into the black kitchen, found the flashlight and climbed gingerly down the cellar stairs. He located a spare fuse, pushed an empty trunk over to the fuse box to stand on and twisted out the old fuse. When the new one was in, he heard the starting click and steady drone of the refrigerator in the kitchen overhead. He headed back to the steps, and stopped. Where the old trunk had been, the cellar floor gleamed oddly bright. He inspected it in the flashlight beam. It was metal! "Son of a gun," said Guy Burckhardt. He shook his head unbelievingly. He peered closer, rubbed the edges of the metallic patch with his thumb and acquired an annoying cut—the edges were sharp. The stained cement floor of the cellar was a thin shell. He found a hammer and cracked it off in a dozen spots—everywhere was metal. The whole cellar was a copper box. Even the cement-brick walls were false fronts over a metal sheath! affled, he attacked one of the foundation beams. That, at least, was real wood. The glass in the cellar windows was real glass. He sucked his bleeding thumb and tried the base of the cellar stairs. Real wood. He chipped at the bricks under the oil burner. Real bricks. The retaining walls, the floor—they were faked. It was as though someone had shored up the house with a frame of metal and then laboriously concealed the evidence. The biggest surprise was the upside-down boat hull that blocked the rear half of the cellar, relic of a brief home workshop period that Burckhardt had gone through a couple of years before. From above, it looked perfectly normal. Inside, though, where there should have been thwarts and seats and lockers, there was a mere tangle of braces, rough and unfinished. "But I built that!" Burckhardt exclaimed, forgetting his thumb. He leaned against the hull dizzily, trying to think this