This was the fourth Department of Patterns story, the third featuring Papa Grand.
Belain, a junior employee of the Department of Patters, hears how the greenkeeper at Les Landes golf course always finds a bunch of carnations in a particular bunker every 13th June. Papa Grand is suspcious and has the ground under the bunker dug up, revealing a corpse. Will the corpse be identified? Will the person who brings the flowers come again?
First published in Argosy, June 1961.
Reprinted as
"The Carnation Anniversary" in
Ellery Queen's Mystery Magazine #230, January, 1963.