I haven’t yet read this short story that Laumer expanded to the novel Dinosaur Beach in 1971, though perhaps some day I will spot the Ballantine paperback, Timetracks, that collected it along with four other stories.

Variants

(1)
  1. “The Timesweepers” by Keith Laumer, in Analog, August 1969.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Keith Laumer