Maurice Costello
Costello was born in Pittsburgh, Pennsylvania to Irish immigrants Ellen (née Fitzgerald; born 1853) and Thomas Costello (born 1852). He made his film debut in 1908, but was long believed to have debuted in "Adventures of Sherlock Holmes; or, Held for Ransom" (1905), supposedly playing the lead in what is regarded as the first serious film to feature the character of Sherlock Holmes, since it was preceded only by the 30-second comedy film "Sherlock Holmes Baffled" (1900). However, Holmesian scholar Leslie S. Klinger has written that the identification of Costello in the role is flawed. Klinger states that the first identification of Costello with the role was in Michael Pointer's "Public Life of Sherlock Holmes" published in 1975 but Pointer later realized his error and wrote to Klinger stating
Adaptations of Sherlock Holmes
Many similar films were made in the early years of the twentieth century, most notably the 13 one- and two-reel silent films produced by the Danish Nordisk Film Company between 1908 and 1911. The only non-lost film is "Sherlock Holmes i Bondefangerkløer", produced in 1910. Holmes was originally played by Viggo Larsen. Other actors who played Holmes in those films were Otto Lagoni, Einar Zangenberg, Lauritz Olsen, and Alwin Neuss. In 1911 the American Biograph company produced a series of 11 short comedies based on the Holmes character with Mack Sennett (later of Keystone Kops fame) in the title role.