The Blue Envelope Mystery
- ปี: 1916
- ประเทศ: United States of America
- ประเภท: หนังชีวิต
- สตูดิโอ: Vitagraph Company of America
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- ผู้อำนวยการ: Wilfrid North
- นักแสดง: Lillian Walker, John Drew Bennett, Bob Hay, Charles Kent, Josephine Earle, Harry Northrup
