Tragedy on the Line is a 1931 detective novel by John Rhode, the pen name of the British writer Cecil Street.

[1] It is the tenth in his long-running series of novels featuring Lancelot Priestley, a Golden Age armchair detective who works alongside the less sharp-witted Superintendent Hanslet of Scotland Yard.

[2] The wealthy Gervase Wickenden is found dead on the railway line near Upton Bishop's station.

Decapitated it is at first assumed he was killed by a train, until a bullet is discovered in a nearby tree.

Added to this was the suspicious fact that he had changed his will only two days before, and both the old and the new version are now missing.