The Diamond Crown, from Edison Studios, was a 1913 American silent film (short) written and directed by J. Searle Dawley.

Mrs. Wethersby comes to the station with the complaint that several thefts have been committed in her house, and Kate is allowed to undertake the investigation as her first case.

That night after the guests have retired, Miss Kirby steals along the dimly lighted hall, and listens with her ear against the wall outside Mrs. Wethersby's room.

The discovery that the revolver is missing leaves her no other alternative than to await the arrival of the police who quickly answer the young detective's signal.

[1] Moving Picture World "The Diamond Crown" (Edison), July 12 – The first of a series of detective stories to be known as the Kate Kirby cases, written by J. Searle Dawley.