The Blue Envelope Mystery
- Jaro: 1916
- Lando: United States of America
- Ĝenro: Drama
- Studio: Vitagraph Company of America
- Ŝlosilvorto:
- Direktoro: Wilfrid North
- Rolantaro: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup
