Doctor Goodwood's Locum

Doctor Goodwood's Locum is a 1951 mystery detective novel by John Rhode, the pen name of the British writer Cecil Street. It is the fifty third in his long-running series of novels featuring Lancelot Priestley, a Golden Age armchair detective. It was published in America the same year by Dodd Mead under the alternative title The Affair of the Substitute Doctor.

Synopsis
In the market town of Patham, Doctor Greenwood takes his annual August holiday with his wife and hires a locum to take over the practice while he is away. But his replacement Stephen Thornhill goes missing after just a few days, and when a body is discovered Scotland Yard are called in to investigate with the assistance of Priestley.