The Psi Encyclopedia is a new collection of articles and case studies about psi research, the scientific investigation of psychic phenomena. It's a work in progress, being created by the Society for Psychical Research in London. Learn more >

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In later life, the creator of Sherlock Holmes became an evangelist for spiritualism. 

Investigator associated with the Society for Psychical Research (1923-2010) who authored reports on poltergeist and haunting cases, some in collaboration with fellow parapsychologist Alan Gauld.

Psychics are often involved in police work, helping to solve crimes and trace missing persons. The record of psychic detection is mixed, with striking successes offset by complete failures.

Examines the theory that poltergeist phenomena represent brief, sporadic and large-scale manifestations of psychokinesis linked to a certain living individual, as opposed to a discarnate spirit. 

Survey of witchcraft beliefs and persecutions in Europe, from antiquity to the late Christian era and its twentieth century revival in the form of Wicca.