310 mins | Horror, Mystery | April 24, 1916
310 mins | Horror, Mystery | April 24, 1916
| Producers | International Film Service, Wharton |
| Original title | The Mysteries of Myra |
| Directors | Theodore Wharton, Leopold Wharton |
| Writers | Hereward Carrington, Charles W. Goddard |
as Myra Maynard
as Dr. Payson Alden
as Arthur Varney
as Master of the Black Order
as Mrs. Maynard
as Willis - The Maynards' Butler
as The Vampire Woman
as Professor Haji