Unfinished Story (#46)

1969-12Magic Universe: Warlock Short StoryFantasy and Science Fiction, December 1969
W. 02

American Journal of Physics, Febrary 1975;
The Time of the Warlock, SteelDragon 1984;
All the Myriad Ways
Playgrounds of the Mind
Warlock short short story, later renamed "Unfinished Story #1."

First published in Fantasy and Science Fiction, December 1969. A brief vignette with a little physics joke, set in the Warlock's universe.