Cast & crew
The Unknown Quantity (1919)
Directed by Thomas R. Mills Written by G. Marion Burton, O. Henry
Cast
| Corinne Griffith | Mary Bennett |
| Huntley Gordon | Dan Vogel |
| Harry Davenport | Septimus |
| Jack McLean | Sammy |
| Jack Ridgeway | Thomas |
| F.R. Buckley | Salt Peter |
Crew
| Thomas R. Mills | Director |
| G. Marion Burton | Writer |
| O. Henry | Story |