Citation

Eleanor M. Sidgwick was an important figure in the early history of the  Society for Psychical Research (SPR). In later years she became known  for her critiques of the evidence for physical mediumship, and for her  systematic studies of apparitions of the dead and hauntings,  premonitions, clairvoyance, and the mediumship of Leonora E. Piper.  Sidgwick also made significant contributions to the study of spontaneous  and experimental telepathy, the cross-correspondences, and book tests,  or attempts to get spirit communicators to obtain veridical information  from the content of a book.