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Henry Slade (1835ā1905) was a famous fraudulent medium who lived and practiced in both Europe and North America. Slade was best known for his "slate writing" method, where he would purportedly produce message written by spirits on slates.
Biography
Slade was most well known as a slate-writing medium. During his sƩances he would place a small slate with a piece of chalk under a table and would claim spirits would use it to write messages. According to Joe Nickell, Slade was repeatedly caught faking the spirit messages in his sƩances and he produced his phenomena by a variety of magic tricks.
Science writer Karen Stollznow has noted that:
Slate writing was a simple parlor trick, often involving a double-sided chalkboard or a hidden slate upon which the "message" was already written. Many mediums were caught faking the practice, including Henry Slade, the man who discovered the phenomenon. Slade was writing these messages from the "dead" using tiny pieces of chalk held in the fingers of either hand, the toes of either foot, or his mouth.
In 1872, Slade was caught in fraud in New York by John W. Truesdell, who had two sittings with him. During the sƩance Truesdell observed Slade using his foot to move objects under the table, and writing on a slate. In a sƩance Stanley LeFevre Krebs employed a secret mirror and caught Slade swapping slates and hiding them in the back of his chair.
In a sƩance in 1876 in London Ray Lankester and Bryan Donkin caught Slade in fraud. Lankester snatched the slate before the "spirit" message was supposed to be written, and found the writing already there. He was prosecuted for fraud on October 1, 1876, in London and was sentenced to three months in prison. However, Slade made an appeal, which was sustained, on the ground that the words "by palmistry or otherwise" had been omitted in the indictment. Before he could be arrested on the new summons, he fled to America.
Slade also performed a trick where he would play an accordion with one hand under the table. The magician Chung Ling Soo exposed how Slade had performed the trick.
Johann Karl Friedrich Zƶllner, Professor of Physics and Astronomy at the University of Leipzig conducted several controlled experiments, using Slade, to evaluate his claims of paranormal ability in 1877. Slade failed some of the tests carried out under controlled conditions but still succeeded in fooling Zƶllner in several other attempts. Zƶllner was convinced in Slade's supernatural abilities and wrote his book Transcendental Physics based on his observations of Slade. Hereward Carrington in his book The Physical Phenomena of Spiritualism (1907) revealed the fraudulent methods (with diagrams of the rope tricks) that Slade used in the Zƶllner experiments. Other notable people who Slade successfully fooled include William Fletcher Barrett and Alfred Russel Wallace. Wallace believed in Slade's abilities despite knowing that they had been debunked by the magician John Nevil Maskelyne in court.
In 1882 in Belleville sƩance sitters caught Slade making "spirit" raps against the rung of his chair, using his foot to move a slate, writing "spirit" messages and substituting slates. He was also exposed as a fraud in 1885 by the Seybert Commission as it was discovered that the slates had prepared messages on them. In 1886-1887, Richard Hodgson and S. J. Davey also exposed slate writing as fraudulent, which contributed to its decline as a spiritualist method.
The magician David Abbott in his book Behind the Scenes with the Mediums (1908) revealed that Slade would also use his toes for writing messages on slates.
Slade died on September 8, 1905, at a sanatorium in Belding, Michigan. He was buried at Riverside Cemetery in Albion.
Confession
The magician Harry Houdini met the ex-medium Remigius Weiss in Philadelphia who had testified to the Seybert Commission that Slade's methods were fraudulent. According to Houdini he had given him the "best expose ever written of Slade's slate writings." Weiss also obtained a signed confession from Slade that all his spiritualist manifestations were deceptions performed through tricks and this confession was reproduced by Houdini in his book A Magician Among the Spirits (first published 1924).
References
External links
Blavatsky Foundation.org 6 page pdf by Walter A. Carrithers, Jr.
Powerful Psychic Reading Spiritualists and Mediums
Albion Michigan History Notebook Article on Henry Slade published in the Morning Star newspaper on October 17, 1993, pg. 6
Internet Archive of Library Books "Spirit Slate Writing And Kindred Phenomena" by William E. Robinson Munn & Company (1898 copyright expired) This book was scanned into the public domain by Google.