The Blue Envelope Mystery
- Ár: 1916
- Land: United States of America
- Genre: Drama
- Stúdíó: Vitagraph Company of America
- Lykilorð:
- Leikstjóri: Wilfrid North
- Leikarar: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup
