given Curran the vocabulary to compose the Patience Worth literature. Physical mediumship Although a believer in mental mediumship, Hyslop is said to have found the physical phenomena of spiritualism "repulsive". In 1906, Hyslop criticized the famous experiments of Johann Karl Friedrich Zöllner with the medium Henry Slade and pointed out eleven possible sources of error. Psychical researcher Hereward Carrington described Hyslop's criticisms as "very fine". In a review for the Journal of American Society for Psychical Research in 1917, Hyslop wrote that various occurrences of levitation could have been faked by trickery. He also reviewed the psychical researcher William Jackson Crawford's experiments with the medium Kathleen Goligher and suggested that reported physical phenomena in the séance room could be unreliable. Personal life and family Hyslop's twin sister, Sarah Luella, died when she was four months old. His three-year-old sister, Anna Laura; and his four-year-old brother, Charles both died of scarlet fever when Hyslop was ten. His parents were devout Presbyterians. As a youth he intended to enter the ministry as his parents expected, but while in college he went through a crisis of faith and became a materialist. In 1891 he married Mary Fry Hall (1860–1900), an American woman who he had met while in Germany. A year after her death he suffered a nervous breakdown. They had one son, George H. Hyslop, and two daughters, Beatrice Fry Hyslop and Mary Winifred Hyslop. Hyslop was a friend of psychologist William James. Hyslop died of thrombosis on June 17, 1920 at age 65, after a long illness. In 1922, William van der Weyde produced an alleged spirit photograph of Hyslop during a séance at the house of Edwin F. Bowers. The photograph impressed members of Hyslop's family. According to Fulton Oursler the photograph was a fake. Weyde had taken a photograph of Hyslop before his death and had a plate in his possession that had never been developed. For some time after his death his research assistant and longtime secretary, Gertrude O. Tubby, received what she believed were communications from Hyslop through many mediums in the United States, France and Britain. "I find it difficult to assume that I am dead," he allegedly said to Gertrude, through the medium, Mrs Chenoweth (1920). Messages such as this, frequently containing apparent cross references to one another, were published in her collection entitled James H. Hyslop - X His Book: A Cross Reference Record