Florence Cook (ca 1856 – 22 April 1904) was a medium who claimed to materialise a spirit, "Katie King". The question of whether the spirit was real or a fraud was a notable public controversy of the mid-1870s. Her abilities were endorsed by Sir William Crookes but many observers were sceptical of Crookes's investigations, both at the time and subsequently.
Cook was a teenage girl who started to claim mediumistic abilities in 1870 and in 1871-2 she developed her abilities under the established mediums Frank Herne and Charles Williams. Herne was associated with the spirit "John King", and Florence became associated with "Katie King", stated to be John King's daughter. Herne was exposed as a fraud in 1875. Katie King developed from appearing as a disembodied face to a fully physical materialisation.
The spirit was said to have appeared first between 1871 and 1874 in séances conducted by Florence Cook in London, and later in 1874–1875 in New York in séances held by the mediums Jennie Holmes and her husband Nelson Holmes.
Katie King was believed by Spiritualists to be the daughter of John King, a spirit control of the 1850s through the 1870s that appeared in many séances involving materialised spirits. A spirit control is a powerful and communicative spirit that organises the appearance of other spirits at a séance. John King claimed to be the spirit of Henry Morgan, the buccaneer (Doyle 1926: volume 1, 241, 277).
At Hackney on 9 December 1873, lawyer William Volckman attended a séance held by Florence Cook, during which Katie King materialised and, as was customary, held the hands of participants. Suspicious of the spirit's similarity with Cook, Volckman seized the spirit's hand and waist, accusing it of being the medium masquerading as her ghost. The spirit was wrestled from Volckman's grasp by other participants and returned to a cabinet from which Cook emerged some minutes later. Volckman published his opinion that the spirit was a masquerade by Cook. Supporters of Miss Cook denounced Volckman on the grounds that he had broken his agreement to proper etiquette required in the séance, thus negating his credibility as an investigator: Volckman was associated with another medium, Mrs Guppy, who might have wished to denigrate her rival. Moreover it was argued that since spirits borrowed energy and matter from their medium, it was not surprising that Katie King resembled Cook. Despite the defence of their position, Cook and her supporters were hurt by this incident – newspapers were referring to it as an "exposure" – and sought further support for their position. To this end, they turned to Crookes, who was a prominent and respected scientist (Noakes, 130-1).
Between 1871 and 1874, Sir William Crookes investigated the preternatural phenomena produced by Spiritualist mediums. He described the conditions he imposed on mediums as follows: "It must be at my own house, and my own selection of friends and spectators, under my own conditions, and I may do whatever I like as regards apparatus" (Doyle 1926: volume 1, 177).
A 15 year old Cook, alone in Crookes' house with Crookes' friends and family as witnesses, was said to have materialised the spirit of Katie King, who walked about, talked, allowed herself to be weighed and measured, and even held the family's baby (Doyle 1926: volume 1, 241). On one occasion, at a joint seance in Croookes's home in March 1874, Katie King was seen in company with "Florence Maple", a spirit materialised by the medium Mary Showers who was exposed as a fraud shortly thereafter. The sessions were held with the medium secluded in the dark, because Spiritualists believe that materialisation requires very dim surroundings to succeed, though occasionally the spirits materialised in the light and some photographs were taken. As is apparently typical of materialised spirits, Katie's exact height and weight varied, though Katie was always taller than Florence Cook, with a larger face, and different hair and skin. According to those present, the two were both visible at the same moments, so that Florence could not have assumed the role of the spirit (Doyle 1926: volume 1, 235–240).
The final appearances of Katie King in connection with Florence Cook took place in April and May 1874 at the Cook family home in Hackney. The audiences were invited to sit in a parlour opening onto a bedroom, in which Florence would start her trance. After some time Katie King would emerge. At some point the audience would be shown a figure, apparently Florence, lying on the floor of the bedroom with her head covered by a shawl while Katie King was still visible in the parlour. A number of the witnesses, such as Edward W. Cox, recorded their doubts about the proceedings, while others claimed that they had seen the two clearly, such as Crookes and Florence Marryat, who claimed that she had seen Katie naked in Florence's company.
Crookes' report, published in 1874, contained his assertion that Florence Cook, as well as the mediums Kate Fox and Daniel Dunglas Home, were producing genuine preternatural phenomena (Crookes 1874). The publication caused an uproar, and his testimony about Katie King was considered the most outrageous and sensational part of the report. Cook was repeatedly exposed as a fraud medium but she had been "trained in the arts of the séance" which managed to trick Crookes.
In 1880 another of Cook's materialisations was interrupted by one of the witnesses, George Sitwell, who seized the spirit figure and revealed that the medium was not in her chair.
After studying the reports science historian Sherrie Lynne Lyons wrote "Katie" was Florence herself and at other times an accomplice. Regarding Crookes, Lyons wrote "Here was a man with a flawless scientific reputation, who discovered a new element, but could not detect a real live maiden who was masquerading as a ghost."
- Oppenheim (1985) p.19
- Hall (1963) pp.1–32
- Hall (1963) p.27
- Hall (1963) pp.28–30
- William Hodson Brock (2008). William Crookes (1832–1919) and the commercialization of science. Science, technology, and culture, 1700–1945. Ashgate Publishing. p. 181. ISBN 0754663221.
- Alex Owen (2004). The Darkened Room: Women, Power, and Spiritualism in Late Victorian England. University of Chicago Press. p. 67. ISBN 0226642054.
- Marlene Tromp (2007). Altered States: Sex, Nation, Drugs, and Self-Transformation in Victorian Spiritualism. Studies in the Long Nineteenth Century. SUNY Press. p. 37. ISBN 0791467406.
- Hall (1963) p.39
- Stein, Gordon (1993). The sorcerer of kings: the case of Daniel Dunglas Home and William Crookes. Prometheus Books. pp. 40–41. ISBN 0879758635.
- Lyons, Sherrie Lynne (2009). Species, serpents, spirits, and skulls: science at the margins of the Victorian age. SUNY Press. p. 100. ISBN 1438427972.
- Hall (1963) pp.54–73
- M. Lamar Keene. (1997). The Psychic Mafia. Prometheus Books. p. 64. ISBN 978-1573921619 "The most famous of materialization mediums, Florence Cook-- though she managed to convince a scientist, Sir William Crookes, that she was genuine-- was repeatedly exposed in fraud. Florence had been trained in the arts of the séance by Frank Herne, a well-known physical medium whose materializations were grabbed on more than one occasion and found to be the medium himself."
- Oppenheim (1985) p.18
- Sherrie Lynne Lyons. (2010). Species, Serpents, Spirits, and Skulls: Science at the Margins in the Victorian Age. State University of New York Press. p. 101. ISBN 978-1438427980
- "Cook, Florence Eliza". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/45794. (Subscription or UK public library membership required.)
- Crookes, William. 1874. "Notes of an Enquiry into the Phenomena called Spiritual during the Years 1870–1873." Quarterly Journal of Science. January 1874.
- Doyle, Arthur Conan. The History of Spiritualism. New York: G.H. Doran, Co. Volume 1: 1926 Volume 2: 1926
- Hall, Trevor H. (1963). The spiritualists: the story of Florence Cook and William Crookes. Helix Press.
- Hall, Tevor H. (1965). "Florence Cook and William Crookes". New Light on Old Ghosts. London: Gerald Duckworth. pp. 67–85.
- Lehman, Amy (2009). Victorian women and the theatre of trance: mediums, spiritualists and mesmerists in performance. McFarland. p. 166. ISBN 0786434791.
- Noakes, Richard. "Instruments to Lay Hold of Spirits." Bodies/Machines. BERG: Oxford, 2002. ISBN 1-85973-690-4
- Oppenheim, Janet (1985). The Other World: Spiritualism and Psychical Research in England, 1850–1914. Cambridge University Press. ISBN 0-521-34767-X.
- Owen, Robert Dale. 1875. "Touching Visitants from a Higher Life." The Atlantic Monthly. 35(207): 57–69
- Williams, Gertrude Marvin. Priestess of the Occult, Madame Blavatsky. New York : A. A. Knopf, 1946.