The Daredevil (1918)

When Roberta Carruthers' father, Capt. Carruthers, is killed in France during the war, she comes to live in the US with her uncle. When she finds out that her uncle is under the impression that his brother had a son and not a daughter, she decides to disguise herself as a male, and calls herself Bob. She becomes a translator for William Faulkner, the governor of the state, and in that capacity exposes a number of German spies. However, Gov. Faulkner manages to meet "Roberta" as a woman, not knowing that she is actually "Bob", his translator--and falls in love with her. Complications ensue.