Material comprises a series of scrapbooks and loose papers containing press cuttings, journal articles, advertisements, letters and photographs including those relating to psychical research, investigations into paranormal events and occurrences, mediums and spiritualists and the exposure of fraudulent practitioners, anthropology, medical research, sexuality, erotic literature, crime, religion and religious beliefs and conjuring. (Items in this series can be cross referenced with the index slips/cards in series three of the collection); a series of notebooks with quotes, extracts and comments by various writers and notes and comments by Dingwall on subjects such as ancient medicine, body decoration, chastity, infibulation, witchcraft, magic, telekinesis, mediumship and demonology, and appointment diaries, including some belonging to Dingwall's wife Dr Margaret Davis; index slips/cards with additional material including press cuttings, articles, letters, postcards and advertisements (the index slips/cards can be cross referenced with the scrapbooks and loose papers in series one); correspondence between Dingwall and various individuals and organisations including author Sir Arthur Conan Doyle, escapologist and psychical researcher Harry Houdini, Professor Alfred Kinsey, psychical researcher and co-author of "The Haunting of Borley Rectory" Trevor Hall, mediums Willi and Rudi Schneider and Margery Crandon, the Society for Psychical Research (including the American branch), the BBC, the Parapsychology Foundation and the College of Psychic Studies as well as correspondence relating to the disposal of Dingwall's estate after his death (THIS SERIES IS CLOSED UNTIL 2025); photographs, glass plate negatives and lantern slides including the Frederick Barlow collection; printed material including copies of "The Demon Telegraph" and various catalogues for conjuring products, and Dingwall's toolkit for investigating hauntings and poltergeist activity. (A second series of scrapbooks referenced R-Z have been transferred to the Harry Price Collection).