For many years Conan Doyle was friends with the famous American escape artist and magician Harry Houdini. Unlike the famous writer, Houdini was an opponent of the Spiritualist movement. His contempt for Spiritualism even doubled in the 1920s when his mother died. He was touring America and Europe making public speeches against mediums.

Houdini made his goal to publicly expose Spiritualist mediums as frauds and presented many examples as proof that they employed trickery fooling gullible people. But for some reason Houdini’s efforts had an opposite effect on his friend Conan Doyle. The famous author became utterly convinced that Houdini himself possessed supernatural powers. Conan Doyle even wrote a book about it. No matter how hard Houdini tried, he could not dissuade Conan Doyle. Harry unsuccessfully tried his best convincing Conan Doyle that his feats were simply magic tricks. In the end two friends had a bitter quarrel in public. This even ended their friendship and they never spoke to each other again.