Four faculty members from a college have been taken hostage, and one has been killed for being a spy—turned in by one of the other three. But which? The only clue is a drawing of a four-leaf clover which Henry correctly interprets.

This story is rather weak, to say the least. Four-leaf clover implies mutations which implies fruit flies (often used to study mutations) which implies an entomologist. Very, very weak.

Found In

	Puzzles of the Black Widowers