The original director, [?] Roland V. Brown, was fired on his first day at work.
Lux Radio Theater broadcast a 60 minute radio adaptation of the movie on December 12, 1938 with Leslie HowardLeslie Howard reprising his film role. Olivia de HavillandOlivia de Havilland performed with him after having just filmed Gone with the Wind together.
The original play opened in London on 5 January 1905, three years before it was novelized.
Percy Blakeney refers to one of the boxers as "Mendoza", a reference to [?] Daniel Mendoza, the 17th-century British Jew who revolutionized boxing. Mendoza was the heavyweight champion of England from 1792-5, despite being a middleweight.