Has Not Been in Vain. Pembridge Publishing. Maurice Barbanell. (1945). The Case of Helen Duncan. Psychic Press. Gena Brealey, Kay Hunter. The Two Worlds of Helen Duncan. Saturday Night Press Publications. Manfred Cassirer. (1996). Medium on Trial. PN Publishing. Simeon Edmunds. (1966). Spiritualism: A Critical Survey. Aquarian Press. Robert Hartley. (2007). Helen Duncan The Mystery Show Trial. HPR Publishing. Alan Crossley. (1976). The Story of Helen Duncan: Materialisation Medium. Arthur H. Stockwell Ltd. Malcolm Gaskill. "Britain's Last Witch". History Today 51 (2001). Malcolm Gaskill. (2001). Hellish Nell: Last of Britain's Witches. Fourth Estate. Renée Haynes. (1982). The Society for Psychical Research 1882–1982: A History. MacDonald & Co. Jenny Hazelgrove. (2000). Spiritualism and British Society Between the Wars. Manchester University Press. "Hellish Nell". The Daily Mirror. 6 December 2006: 24. Paul Kurtz. (1985). A Skeptic's Handbook of Parapsychology. Prometheus Books. Georgess McHargue. (1972). Facts, Frauds, and Phantasms: A Survey of the Spiritualist Movement. Doubleday. Helena Normanton. (1945). The Trial of Mrs Duncan. London: Jarrolds. Harry Price. (1931). Regurgitation and the Duncan Mediumship. (Bulletin I of the National Laboratory of Psychical Research, 120pp with 44 illustrations.) Harry Price. (1933). The Cheese-Cloth Worshippers. In Leaves from a Psychist's Case-Book. Victor Gollancz Ltd. Harry Price. (1936). Confessions of a Ghost-Hunter. Putnam. Harry Price. (1942). Search for Truth: My Life for Psychical Research. Collins. Mary Roach. (2007). Six Feet Over: Adventures in the Afterlife. Canongate Books Ltd. Nina Shandler. (2006). The Strange Case of Hellish Nell. Da Capo Press. Roy Stemman. (1976). The Supernatural. Danbury Press. Paul Tabori. (1961). The Art of Folly. Prentice-Hall International, Inc. Paul Tabori. (1966). Harry Price: The Biography of a Ghosthunter. Living Books. Donald J. West. (1946). The Trial of Mrs Duncan. Proceedings of the Society for Psychical Research 48: 32–64. External links Inside story: 301 Copnor Road by Roger Wilkes Article in World War II magazine about Duncan and HMS Barham The Harry Price Website – Psychical researcher Harry Price's 1931 examination of Helen Duncan's séance room practices. Campaign to have Helen Duncan posthumously pardoned 1897 births 1956 deaths British women in World War II Paranormal hoaxes People from Stirling (council area) Scottish fraudsters Scottish spiritual mediums Witchcraft in Scotland 20th-century Scottish businesspeople