John Dickson Carr

Origin and use of Locked room mysteries

Photo by Jr Korpa on Unsplash

Locked room mysteries — what a rush for anyone who loves a good puzzle. The setup’s so simple: someone’s dead in a room that’s locked up tighter than a drum. No footprints, no open windows, no secret passages. You’re left wondering how anyone could’ve pulled it off. Readers in the 1920s and 1930s couldn’t get enough of these stories, always racing to solve the mystery before the author let them in on the secret.

John Dickson Carr basically owned this genre. He thrived on the impossible, always dreaming up new tricks to stump even the most seasoned armchair detectives.

But let’s be real — Carr didn’t invent the whole thing. Edgar Allan Poe kicked it all off with “Murders in the Rue Morgue.” That’s where the whole locked room blueprint comes from. Ellery Queen jumped in with “The Chinese Orange Mystery,” and Edgar Wallace added “The Clue of the New Pin” to the mix.

Carr had a real soft spot for Gaston Leroux’s “The Mystery of the Yellow Room” from 1908. He admitted the book was a little chaotic — brilliant puzzle, but the detective? Not exactly a genius. Still, it’s got that unmistakable French flavor, maybe even a bit too much sometimes.

But Carr didn’t just follow the rules. He loved to mess with them. Books like “It Walks by Night” and especially “The Three Coffins” take the locked room setup and twist it every which way. Sometimes the killer practically waltzes through the only door while everyone’s watching, and then — poof — gone. Witnesses swear nobody came or went, so what’s the trick?

Then there’s the old “no footprints” gag. The murder happens in mud, snow, or sand where the killer should’ve left a trail, but the ground’s spotless. Carr couldn’t resist that one, either. You’ll see it in “The White Priory Murders,” “The Problem of the Wire Cage,” “Witch of the Low Tide,” and a bunch more. He loved watching readers squirm, daring them to figure it out before he showed his hand. That’s the real fun of a locked room mystery.

Honestly, nobody else could keep churning out books with not just one, but several impossible crimes — just look at “Case of the Constant Suicides,” “He Who Whispers,” “The Burning Court,” and, yeah, “The Three Coffins.”

Clayton Rawson tried to keep up with his Great Merlini stories, but he never quite hit the mark. Carr always said one impossible crime was enough, but he couldn’t stop pushing the limits. That’s what set him apart.