Why do these two historic university cities appear in so many murder mysteries?

Books mentioned in this episode: — The Masters by C.P. Snow — Lucky Jim by Kingsley Amis — Brideshead Revisited by Evelyn Waugh — Zuleika Dobson by Max Beerbohm — Gaudy Night by Dorothy L. Sayers — The Case of the Gilded Fly by Edmund Crispin — The Cambridge Murders by Dilwyn Rees — Death at the President’s Lodging by Michael Innes — An Oxford Tragedy by J.C. Masterman (£825.00) — Death on the Cherwell by Mavis Doriel Hay — Murder at Cambridge by Q Patrick — Police at the Funeral by Margery Allingham — The Incredible Crime by Lois Austen-Leigh — Last Bus to Woodstock by Colin Dexter — Trick of the Dark by Val McDermid — Case Histories by Kate Atkinson — Cambridge Blue by Alison Bruce — Fall of Angels by Barbara Cleverly — Invitation to Die by Barbara Cleverly — James Runcie's Granchester stories — Rory Clement's Tom Wilde series

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