Mary's Ankle(1920)

Three young men, struggling to find their next meal, encounter a young lady with an injured ankle. One of the men is a doctor, who maintains a charade of success with his wealthy uncle, in which the uncle believes the young man to be well-off and married to a (fictitious) wife named Mary Jane Smith. The young doctor falls in love with the girl of the injured ankle and discovers that her name is Mary Jane Smith.