Apparently, time travel has rules. For example, you cannot go back and simply take something from the past—it must be given to you. Thus, our man from the future must talk young Oliver Wilson Knight and his girlfriend into giving up the 1990 almanac that they bought in 1950.
If there was such a thing as a 1990 almanac, and if it was in that package, wild horses couldn’t get it away from me.

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  1. “Of Time and Third Avenue” by Alfred Bester, Magazine of Fantasy and Science Fiction, October 1951.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Alfred Bester