The Guyra Ghost Mystery is a 1921 Australian film written and directed by John Cosgrove.
In April 1921, the family of William Bowen in Guyra reported knocking on the walls and stones being thrown on their roof.
[7] A friend of Sir Arthur Conan Doyle, then touring Australia, visited to help investigate.
[8] One of the children, Minnie Bowen, later confessed to throwing some stones and it is thought that practical jokers were behind it, but the mystery was never completely solved.
[13] Cosgrove reportedly arrived in the town in May 1921, accompanied by a cameraman, and approached the Bowens directly asking for their co operation in making the film.
[16][17][18] The film, with a runtime of approximately 50 minutes, was advertised as containing "five reels of laughter" indicating it was a comedy.