(no Holmes picture) (no Watson picture)

Adaptation

Sherlock Holmes Solves the Sign of the Four

This Film was released on 25 February 1913, by Thanhouser Film Corporation.
IMDb: Sherlock Holmes Solves the Sign of the Four 
Letterboxd: Sherlock Holmes Solves the Sign of the Four 

Canon basis: The Sign of the Four

Sherlock Holmes played by: Harry Benham
Dr. Watson played by: Charles Gunn

Turn on <canvas>.
Cast
Harry Benham as Sherlock Holmes
Charles Gunn as Dr. John H. Watson
Mignon Anderson as Mary Morstan