For the film , Warner Brothers intended to cast the more bankable Edward G. Robinson as Duke ; but Howard , whose contract gave him final script control , informed the studio that he would not appear in the movie version without Bogart as his co-star . The film made Bogart a star , and he remained grateful to Howard for the rest of his life . In 1952 , Bogart and Lauren Bacall named their daughter Leslie Howard Bogart in honor of Howard , who had been killed in a plane crash under controversial circumstances during World War II
killed in a plane crash
BOAC Flight 777
The Petrified Forest