He put the notes away and went back to his desk, rummaging through the drawers, and finding nothing. He searched everywhere in the apartment where a sheet of paper could have been mislaid, taking all his books, one by one, from the shelves and leafing through them, even books he knew he had not touched for more than three years. In the end, he sat down again at his desk, defeated. The note on the _Kilroy_ simply did not exist. Of course, that didn't settle it, as finding the note would have. He remembered--or believed he remembered--having gotten that item of knowledge--or delusion--in 1970, shortly before the end of the school term. It hadn't been until after the fall opening of school that he had begun making notes. He could have had the knowledge of the robot rocket in his mind then, and neglected putting it on paper. He undressed, put on his pajamas, poured himself a drink, and went to bed. Three hours later, still awake, he got up, and poured himself another, bigger, drink. Somehow, eventually, he fell asleep. * * * * * The next morning, he searched his desk and book-case in the office at school. He had never kept a diary; now he was wishing that he had. That might have contained something that would be evidence, one way or the other. All day, he vacillated between conviction of the reality of his future knowledge and resolution to have no more to do with it. Once he decided to destroy all the notes he had made, and thought of making a special study of some facet of history, and writing another book, to occupy his mind. After lunch, he found that more data on the period immediately before the Thirty Days' War was coming into his consciousness. He resolutely suppressed it, knowing as he did that it might never come to him again. That evening, too, he cooked dinner for himself at his apartment, and laid out his class-work for the next day. He'd better not stay in, that evening; too much temptation to settle himself by the living-room fire with his pipe and his notepad and indulge in the vice he had determined to renounce. After a little debate, he decided upon a movie; he put on again the suit he had taken off on coming home, and went out. * * * * *