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
Basil Rathbone
Rathbone is most widely recognised for his many portrayals of Sherlock Holmes. In a radio interview Rathbone recalled that Twentieth Century-Fox producer and director Gene Markey, lunching with producer-director-actor Gregory Ratoff and 20th Century-Fox mogul Daryl Zanuck at Lucey's Restaurant in Hollywood, proposed a film version of Sir Arthur Conan Doyle's "The Hound of the Baskervilles". When asked who could possibly play Holmes, Markey incredulously replied, ""Who?!" Basil Rathbone!" The film was so successful that Fox produced a sequel which appeared later in 1939. Interest in Holmes cooled at Fox, but Universal Pictures picked up the character, and twelve feature films were made between 1941 and 1944 for release until 1947, all of which co-starred Nigel Bruce as Dr. Watson.