The Unknown Quantity
| MPAA Rating: | NR |
| Genre: | Drama |
| Country: | United States |
| Directed By: | Thomas R. Mills |
| Written By: | O. Henry, G. Marion Burton |
| Cast: | Harry Davenport, Corinne Griffith, Jack Ridgeway, Huntley Gordon, Frederick Buckley, Jack McLean |
| In Theaters: | Apr 14, 1919 |
Followers: 0