The clash between the champions of scientific skepticism and supernaturalism.
Harry Houdini (1874-1926) was best known as the world’s most famous magician during his lifetime, and also as a tireless debunker of false mediums and dishonest claims of profit-driven supernaturalists. He followed a simple strategy, one that’s the fundamental basis of the scientific method: Work hard to falsify all new hypotheses, and maintain a mind open to all new evidence. Sadly for Houdini, this meant testing what could have been one of the most important personal relationships to the history of public understanding of science.
Much has been made of the friendship between Houdini and Sir Arthur Conan Doyle. As the creator of Sherlock Holmes, Sir Arthur would seem to have been a man of science and rational thought, but he was a lifelong steadfast believer in the supernatural. In fact, it was something that was at the forefront of his attention much of the time. One of the most telling events in Sir Arthur’s career came when he was a member of the Society for Psychical Research, which is often criticized for being composed mainly of true believers in the paranormal, and not all that interested in objective research. In the 1920s, Sir Arthur led a mass resignation of 84 members of the Society, on the grounds that it was too skeptical. The staunchest of the resignees joined the Ghost Club, of which Sir Arthur was a longtime member. The Ghost Club made no apologies for being fully dedicated to the supernatural as an absolute fact. In addition, Sir Arthur’s wife, Lady Doyle, was a medium who often conducted séances appearing to be in communication with the dead, and Sir Arthur was absolutely convinced of the reality of her ability.
Despite a radical difference of opinion, Houdini and Sir Arthur managed to keep their friendship alive for some years, each often writing to the other of their mutual respect, their agreement to disagree, and the value of honesty and integrity in one’s own beliefs — neither man ever doubting the other’s sincerity; at least for a while.
In the spring of 1922, Houdini invited Sir Arthur to the home of his friend Bernard Ernst, a lawyer in New York, in an effort to show him that even the most amazing feats of mediums could be accomplished by skilled — albeit earthly — trickery. He had good reason to sway Sir Arthur if he could; Sir Arthur was passionately engaged in promoting the supernatural to his vast worldwide audience, a public disservice if there ever was one, as honestly intentioned as it was. Houdini prepared a magic trick, one that’s familiar to any practitioner of the art. He had Sir Arthur go outside in private and write a simple note that there’s no way Houdini could have seen; and then upon his return to the room, Houdini had a cork ball soaked in white ink magically roll around on a slate and spell out the very note Sir Arthur had written. Sir Arthur was aghast. Houdini wrote him: . . .
Also See: An Actual Recording Of Arthur Conan Doyle’s “Spirit” From A 1934 Séance (io9.com)