Mary Martin of Edinburgh is seeking a pardon for her grandmother, Helen Duncan, who was prosecuted during World War II as a witch only because she was a
witch "spiritualist materialisation medium."
At a séance in 1943 it was claimed that the spirit of a sailor from the HMS Barham appeared.
The vessel was only officially declared lost several months later.
She was arrested in 1944 and sentenced to nine months in prison at the Old Bailey for crimes under the Witchcraft Act of 1735.
"Some people said it was treason. My grandmother had two sons and two son in laws in the forces ... and there is no way she would have given anybody information." [Link, via Boing Boing]