50 mins | Drama | Oct. 23, 1916
50 mins | Drama | Oct. 23, 1916
| Producers | Vitagraph Company of America |
| Original title | The Blue Envelope Mystery |
| Directors | Wilfrid North |
| Writers | Helen Duey, Sophie Kerr |
as Leslie Brennan
as Ewen Kennedy
as Harry Heath
as Uncle Bob
as Miss Lacy
as Fischer
as Mrs. Davis
as Mrs. Harris
as George
as Bit Part (uncredited)