The Blue Envelope Mystery
- Sena: 1916
- Pajjiż: United States of America
- Ġeneru: Drama
- Studio: Vitagraph Company of America
- Kelma ewlenija:
- Direttur: Wilfrid North
- Kast: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup
