When a contraption drops onto the Coon Creek Institute causing various objects to appear and disappear from out of time, Old Prather calls together three former students: someone with expertise in time travel (our discredited time-travel researcher and narrator, Charley Spencer), one who’s a mean-spirited, world-famous mathematician (Leonard Asbury), and with no preconceptions about the matter (the lovely composer, Mary Holland, who broken more than one heart on the campus).
A time machine has fallen into a clump of birch just above the little pond back of the machine shops.

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  1. “The Birch Clump Cylinder” by Clifford D. Simak, in Stellar 1, edited by Judy-Lynn de Rey (Ballantine Books, September 1974).
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Clifford D. Simak