The Paddington Mystery

The Paddington Mystery is a 1925 detective novel by John Rhode, the pen name of the British writer Cecil Street. It marked the first appearance of Lancelot Priestley, who featured in a long-running series of novels during the Golden Age of Detective Fiction. A scientific genius, Priestley is an armchair detective who can solve a mystery without actually visiting the scene of the crime.

Synopsis
After returning one night from a nightclub, Harold Merefield finds a man's dead body lying in his bed. He turns to Doctor Priestley, the father of his former fiancée April.