 From "Mystery Mile" onwards, Campion is normally aided by his manservant, Magersfontein Lugg, an uncouth, rough-and-tumble fellow who used to be a burglar.Campion is good friends with Inspector (later Superintendent) Stanislaus Oates of Scotland Yard, who is as by-the-book as Campion is unorthodox, and in later books with Oates's protégé Inspector Charles Luke.In wartime, Campion is involved in intelligence work, and after the war he continues to have a connection to the secret services.