March 1848. Mysterious knocks are heard in a little house in rural New York, throwing the community into turmoil. Are the children who live there -- Kate and Maggie Fox, sisters aged eleven and fourteen -- making the raps to trick their parents? Or are the girls mediums for otherworldly messages? From a battery of strange sounds and the excitement they create, modern Spiritualism is born. Talking to the Dead: Kate and Maggie Fox and the Rise of Spiritualism...