Mystery House is a 1938 mysterycrime film, directed by Noel M. Smith and starring Dick Purcell and Ann Sheridan as nurse Sarah Keate, and is based on the 1930 novel The Mystery of Huntings End by Mignon G. Eberhart. Sheridan also played the same character in The Patient in Room 18, released in January 1938, while Aline MacMahon played her in While the Patient Slept in 1935.
The film was released theatrically by Warner Bros. in May 1938. It was never officially released on any home video format until issued by the Warner Archive Collection in October 2010 as part of a sixfilm horrormystery DVD set.
Source: Wikipedia