The Old Peddler Woman was an alleged ghost rumoured to haunt Comarth Grange. In October 1955, three members of the University of South Grimster's parapsychology unit — John Struther, Margaret Schuman and Stanley Harris — investigated the house. That night, Margaret was strangled to death, apparently by the ghost, who was photographed by Stanley.

Fifty years later, in 2005, the cast and crew of the television series Most Horrid along with Stanley, visited Comarth Grange to record an episode there. They were interrupted by the arrival of Iris Wildthyme, who revealed that she had been the "ghost"; she had visited the house to borrow milk for her tea, thought Margaret was asleep and was trying to wake her up when the photograph was taken. Now realising what had really happened, Iris dressed up as the ghost and confronted Stanley, who confessed that he was the real murderer. (PROSE: Most Horrid)

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