Anthony Ruthven Gethryn is a character depicted in novels by Philip MacDonald and their cinematic counterparts.
Gethryn is the series detective for more than a dozen of Philip MacDonald's murder mysteries, written between 1924 and 1959.
[citation needed] In the 1939 film, The Nursemaid Who Disappeared, the character of Gethryn is played by Arthur Margetson.
[citation needed] In the 1940 film, Hangman's Noose, adapted from Macdonald's Rope to Spare, André Luguet plays the role of Gethryn.
[citation needed] George C. Scott played Gethryn in the 1963 film The List of Adrian Messenger, based on MacDonald's 1959 novel of the same name.