A Presumption of Death is a 2002 Lord Peter Wimsey–Harriet Vane mystery novel by Jill Paton Walsh, based loosely on The Wimsey Papers by Dorothy L. Sayers. The novel is Walsh's first original Lord Peter Wimsey novel, following Thrones, Dominations, which Sayers left as an unfinished manuscript, and was completed by Walsh. A Presumption of Death is written by Walsh, except for excerpts from The Wimsey Papers.

Lord Peter Death Bredon Wimsey is the fictional protagonist in a series of detective novels and short stories by Dorothy L. Sayers. A dilettante who solves mysteries for his own amusement, Wimsey is an archetype for the British gentleman detective. He is often assisted by his valet and former batman, Mervyn Bunter; by his good friend and later brother-in-law, police detective Charles Parker; and, in a few books, by Harriet Vane, who becomes his wife.