The Mystery of the Octagonal Room
| MPAA Rating: | NR |
| Genre: | Drama, Mystery, Short |
| Country: | United States |
| Directed By: | George Lessey |
| Written By: | Thomas W. Hanshew |
| Cast: | Gertrude McCoy, T. Tamamoto, Harry Beaumont, Ben F. Wilson, Joseph Manning, Duncan McRae, Sally Crute, Robert Brower |
| In Theaters: | Aug 25, 1914 |
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