In 1856 William Dove, a young tenant farmer, was tried and executed for the poisoning of his wife Harriet. The trial might have been a straightforward case of homicide, but because Dove became involved with Henry Harrison, a Leeds wizard, and demonstrated through his actions and words a strong belief in magic and the powers of the devil, considerable effort was made to establish whether these beliefs were symptomatic of insanity. It seems that Dove murdered his wife to hasten a prediction made by Harrison that he would remarry a more attractive and wealthy woman. Dove employed Harrison to...