Katie King was the name given by Spiritualists in the 1870s to what they believed to be a materialized spirit. The question of whether the spirit was real or a fraud was a notable public controversy of the mid-1870s.

The spirit was said to have appeared first in 1871 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 materialized spirits. A spirit control is a powerful and communicative spirit that organizes 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).

Florence Cook

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Between 1871 and 1874, Sir William Crookes, a prominent and respected scientist, 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).

Florence Cook, a 15 year old girl, alone in Crookes' house with Crookes' friends and family as witnesses, was said to have materialized 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). The sessions were held in the dark, because Spiritualists believe that materialization requires very dim surroundings to succeed, though occasionally some red light was used and some photographs were taken. As is apparently typical of materialized 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).

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. Crookes very nearly lost his Fellowship at the Royal Society, and did not again engage in Spiritualist research (Doyle 1926: volume 1, 169).

Jennie and Nelson Holmes

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After news of Katie King had spread abroad, the American mediums Jennie and Nelson Holmes also claimed to have materialized her. Robert Dale Owen, the politician and avowed Spiritualist, had experienced this materialization and wrote about it in an article for the Atlantic Monthly in January 1875.

Just as the article was going to press, however, a woman named Eliza White stepped forward and claimed to have masqueraded as Katie. White's face matched that of "Katie King" in photographs sold by the Holmeses and their agents. Both the Atlantic Monthly and Owen admitted in public to being duped. Arthur Conan Doyle maintains that this "exposure" did more damage to Spiritualism than any other exposure of the period (Doyle 1926: volume 1, 269-277).

Investigations conducted by leading Spiritualist Henry Steel Olcott in 1875 re-established the credibility of the Holmeses in the eyes of many Spiritualists. The story eventually accepted by most Spiritualists was that Eliza White had been hired to pose as Katie King for a photograph to sell to the public. The Holmeses had not wanted to photograph the real Katie King, since bright light would have ruined the materialization. Once involved, Eliza White first extorted money from the Holmeses, and then sold the story to the press (Doyle 1926: volume 1, 269-277).

References

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• 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
• 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.

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