The Blue Envelope Mystery
- Bliadhna: 1916
- Dùthaich: United States of America
- Seòrsa: Drama
- Stiùidio: Vitagraph Company of America
- Faclan-luirg:
- Stiùiriche: Wilfrid North
- Cast: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup
