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 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.