"I wish I could be sure, myself, Dad," he said. "You see, when I woke, this morning, I hadn't the least recollection of anything I'd done yesterday. August 4, 1945, that is," he specified. "I was positively convinced that I was a man of forty-three, and my last memory was of lying on a stretcher, injured by a bomb explosion. And I was equally convinced that this had happened in 1975." "Huh?" His father straightened. "Did you say nineteen _seventy_-five?" He thought for a moment. "That's right; in 1975, you will be forty-three. A bomb, you say?" Allan nodded. "During the siege of Buffalo, in the Third World War," he said, "I was a captain in G5--Scientific Warfare, General Staff. There'd been a transpolar air invasion of Canada, and I'd been sent to the front to check on service failures of a new lubricating oil for combat equipment. A week after I got there, Ottawa fell, and the retreat started. We made a stand at Buffalo, and that was where I copped it. I remember being picked up, and getting a narcotic injection. The next thing I knew, I was in bed, upstairs, and it was 1945 again, and I was back in my own little thirteen-year-old body." "Oh, Allan, you just had a nightmare to end nightmares!" his father assured him, laughing a trifle too heartily. "That's all!" "That was one of the first things I thought of. I had to reject it; it just wouldn't fit the facts. Look; a normal dream is part of the dreamer's own physical brain, isn't it? Well, here is a part about two thousand per cent greater than the whole from which it was taken. Which is absurd." "You mean all this Battle of Buffalo stuff? That's easy. All the radio commentators have been harping on the horrors of World War III, and you couldn't have avoided hearing some of it. You just have an undigested chunk of H. V. Kaltenborn raising hell in your subconscious." "It wasn't just World War III; it was everything. My four years at high school, and my four years at Penn State, and my seven years as a reporter on the Philadelphia Record. And my novels: '_Children of the Mist_,' '_Rose of Death_,' '_Conqueror's Road_.' They were no kid stuff. Why, yesterday I'd never even have thought of some of the ideas I used in my detective stories, that I published under a _nom-de-plume_. And my hobby, chemistry; I was pretty good at that. Patented a couple of processes that made me as much money as my writing. You think a thirteen-year-old just dreamed all that up? Or, here; you speak French, don't you?" He switched languages and spoke at some length in good conversational slang-spiced Parisian. "Too bad you don't speak Spanish, too," he added, reverting to English. "Except for a Mexican accent you could cut with a machete, I'm even better there than in French. And I know some German, and a little Russian." * * * * * Blake Hartley was staring at his son, stunned. It was some time before he could make himself speak.