The twelve chapters of the story were each written by a different author, in the following sequence: Canon Victor Whitechurch, G. D. H. Cole and Margaret Cole, Henry Wade, Agatha Christie, John Rhode, Milward Kennedy, Dorothy L. Sayers, Ronald Knox, Freeman Wills Crofts, Edgar Jepson, Clemence Dane and Anthony Berkeley.
Admiral | Vice Admiral | Rear Admiral | admiral | Admiral (Royal Navy) | Admiral of the Fleet | Vice admiral (United States) | rear admiral | Rear admiral (United States) | Admiral of the Fleet (Royal Navy) | Rear admiral | List of Lords High Admiral | Admiral of the fleet | War Admiral | Rear Admiral (United States) | Rear Admiral (Royal Navy) | Admiral (United States) | Opel Admiral | James Somerville (admiral) | German cruiser Admiral Graf Spee | Floating Me | floating bridge | floating | Admiral's Cup | Admiral of France | Admiral Freebee | Vice admiral (Royal Navy) | Vice-Admiral of the West | vice admiral | Uncle Albert/Admiral Halsey |