The Moving Toyshop

The Moving Toyshop (1946) is a work of detective fiction by Edmund Crispin, featuring his recurrent sleuth, Gervase Fen, an Oxford professor of English Language and Literature.

The tiles comes from a quote from Pope's The Rape of the Lock:

With varying vanities, from every part,
They shift the moving toyshop of their heart

The novel is dedicated to the poet Philip Larkin, Crispin's contemporary at St John's College, Oxford. In chapter 10, tongue-in-cheek reference is made to Larkin, with the mention of an undergraduate essay called "The Influence of Sir Gawain on Arnold's Empedocles on Etna", about which Fen comments: "Good heavens, that must be Larkin: the most indefatigable searcher out of pointless correspondences the world has ever known."

Famous poet Richard Cadogan takes an impromptu holiday to Oxford, where he studied at the university, after growing bored with the literary life in the suburbs. After finding himself in a high street, in the middle of the night and with no place to stay, he stumbles across a shop with its awning still up. Closer inspection reveals it to be a toyshop, and on finding the door unlocked, curiosity leads Cadogan inside, then up a flight of stairs to a flat where he finds the murdered body of an elderly woman, before being knocked unconscious. He wakes up the next morning in a supply closet, but after escaping and bringing back the police, the toyshop is no longer there, replaced, it seems, with a grocer's.

Bewildered, Cadogan turns to an old friend at Oxford University, eccentric professor and amateur sleuth Gervase Fen, to help him solve the mystery of the moving toyshop.

The book provided the source for the famous merry-go-round sequence at the climax of Alfred Hitchcock's Strangers on a Train. All the major elements of the scene: the two men struggling, the accidentally shot attendant, the out-of-control merry-go-round, and the crawling under the moving merry-go-round to disable it, are present in Crispin's novel, though he received no screen credit for it.

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