Margaret Schuman was a member of the University of South Grimster's parapsychology unit in the mid-20th century, along with her boyfriend John Struther and Stanley Harris. In October 1955, they investigated the alleged haunting of Comarth Grange by a ghost known as the Old Peddler Woman. That night, Margaret was strangled to death, apparently by the ghost, who was photographed by Stanley.

Fifty years later, in 2005, the truth about the murder was finally revealed by Iris Wildthyme and the cast and crew of the television series Most Horrid: Stanley himself had strangled Margaret after he had made a pass at her and she threatened to tell John. (PROSE: Most Horrid)

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