The Bat is a 1926 American silent comedy mystery film directed by Roland West and starring Jack Pickford and Louise Fazenda. The film is based on the 1920 Broadway hit play The Bat by Mary Roberts Rinehart and Avery Hopwood, which itself was an adaptation of Rinehart's 1908 mystery novel The Circular Staircase. The Bat has been cited as an early influence on the "slasher film" genre. Plot Gideon Bell, owner of the Favre Emeralds, receives a letter stating that the emeralds will be stolen at midnight by "the Bat", and that police will not be able to stop the robbery. The Bat, a figure dressed as a bat, murders Gideon and steals the emeralds. The Bat leaves a bat-shaped note for the chief of police to inform him that he will be traveling to the country. The Bat travels by car to a mansion built by Courtleigh Fleming, the president of the Oakdale Bank, who has recently been found dead in Colorado. The mansion is being rented for the summer by writer Cornelia Van Gorder, whose maid, Lizzie Allen, sets up a bear trap to catch the Bat. Richard Fleming, Courtleigh's spendthrift nephew, wishes to lease the mansion, and plans with Dr. H. E. Wells to frighten Van Gorder away. The newspaper reports that Brooks Bailey, a cashier at Oakdale Bank, has robbed the bank of $200,000 and has disappeared. Van Gorder's niece, Miss Dale Ogden, arrives with a supposed new gardener. Van Gorder asks the gardener about his knowledge on alopecia, urticaria, and rubeola, and he answers as if the terms referred to plants rather than medical conditions. On the staircase, Richard is shot, and Miss Dale manages to snatch part of a blueprint of the house from his pocket. Detective Moletti accuses her of trying to find a supposed hidden room in the mansion that should be shown on the blueprint. Detective Anderson arrives, and the group gets a call from the house phone in the garage, which sounds like groans of distress. A circular light shines on the wall, with the shadow of a bat in its center, but after investigating, the group finds that the shape was caused by a miller moth on a car headlight. Dr. Wells has Miss Dale recreate Richard's murder, and she notes that she tucked the blueprint in a Parker House roll on a tray, but the blueprint is now