The Blue Envelope Mystery
- Odun: 1916
- Orilẹ-ede: United States of America
- Oriṣi: Drama
- Situdio: Vitagraph Company of America
- Koko-ọrọ:
- Oludari: Wilfrid North
- Simẹnti: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup