Have His Carcase is a 1932 novel by Dorothy L. Sayers, her seventh featuring Lord Peter Wimsey and her second novel in which Harriet Vane appears. The title is taken from an old legal writ.
Harriet goes off on a hiking trip along the seashore, after being acquitted of murder charges in Strong Poison, and discovers the body of a man with his throat recently cut. She calls in Lord Peter to help her deal with the press as well as the police, and together they solve the crime. Meanwhile, he keeps taking every likely opportunity to ask her to marry him, and she keeps refusing, as much because she mistrusts her own feelings as because she doubts his.
Have His Carcase was adapted for television in 1987 as part of a series starring Edward Petherbridge as Lord Peter and Harriet Walter as Harriet Vane.