A Perfect Crime (1921)

Wally Griggs is your classic meek, mild bank messenger, destined to a threadbare life of earning 63 dollars a month. At least this is what he seems to be. But when he's not working Griggs is the dashing James Brown, an adventurer and storyteller who is familiar with bank president Halliday. A publisher, fascinated by Brown's wild tales, offers him a deal. Griggs also uses his alter ego to help Mary Oliver, the girl her loves.