The 1931 newly formed Detection Club members wrote one chapter each, one the prologue, and another a close for The Floating Admiral, and all devised solutions included in final publication. Authors then: Anthony Berkeley, G.K. Chesterton, Agatha Christie, G.D.H. Cole, Margaret Cole, Freeman Wills Croft, Clemence Dane , Edgar Jepson, Milward Kennedy, Ronald Knox, John Rhode, Dorothy L. Sayers, Henry Wade, Victor L. Whitechurch.
In 1933, Ask a Policeman added Gladys Mitchell and Australian-born Helen de Guerry Simpson (1897-1940).
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