The Case of the Gilded Fly
by Edmund Crispin;
A Gervase Fen Mystery.
Vintage 2009 (1944)
“I pardon that man’s life. What was thy cause? Adultery?
Thou shalt not die: die for adultery! No:
The wren goes to ‘t, and the small gilded fly
Does lecher in my sight.
Let copulation thrive…”
— ‘King Lear’, Act IV, Scene 6
In this crime mystery abounding in literary references the reader’s attention is of course arrested by the titular gilded fly, a clear reference (as the closing chapter confirms) to Lear’s conversation with the blinded Duke of Gloucester. Superficially the Gilded Fly is a detail on a finger ring found on the first victim, but the author knew — as did Shakespeare — that the iridescent insect has a reputation for wantonness. (In folklore the diminutive wren, incidentally, also became King of the Birds through trickery).
While the ring itself turns out to be a red herring the theme of extramarital sex runs throughout the plot, especially when we are asked to consider motive, means and opportunity. But, as suits a novel from the Golden Age of crime fiction, it is the tricky nature of the storytelling which elicits appreciation more than any attempt at realism, for this is as preposterous a tale of coincidence and opportunism as any ghost story or Jacobean tragedy.