There are a covey of witch museums around town, including the world-class Peabody Essex Museum, which houses 552 original documents on the Salem witch trial.
Mr Murrell said that as a "geeky teenager" he had regularly seen the Witch during many trips to the museum and instantly recognised its parts in the background of the photograph.
On subsequent trips to the storage facility the various parts of the Witch were found, retrieved and then taken to the museum at Bletchley where restoration began.