Great Spiritualists and Friends
From First Spiritual Temple:
Sir Arthur Conan Doyle's most substantive book on Spiritualism is the two-volume set, The History of Spiritualism. This is an absolute must-read for all students of the subject. Within its pages, he discusses a wide range of subjects and personalities linked with the Modern Spiritualist Movement, both in America and the United Kingdom.
He began his mission in 1918, with visits to most of the major cities of Great Britain. Then, during 1920 and 1921, he visited Australia and New Zealand. Early in 1922, he went to America and toured the Eastern states; the following year, he traveled as far as California. In 1928, he left for South Africa, and in the autumn of that same year, he preached Spiritualism in the Northern countries of Europe.
Sir Arthur Ignatius Conan Doyle was a British author most noted for his stories about the detective Sherlock Holmes, which are generally considered a major innovation in the field of crime fiction, and for the adventures of Professor Challenger.
From 1876 to 1881, he studied medicine at the University of Edinburgh. While studying, he also began writing short stories; his first published story appeared in Chambers's Edinburgh Journal before he was 20.
After the death of his wife Louisa in 1906, and the death of his son Kingsley, his brother Innes, his two brothers-in-law and his two nephews shortly after World War I, Conan Doyle sank into depression. He found solace supporting Spiritualism and its alleged scientific proof of existence beyond the grave.
In his The History of Spiritualism (1926), Conan Doyle praised the psychic phenomena and spirit materialisations produced by Eusapia Palladino and Mina "Margery" Crandon.
Note: The part about Spiritualism starts at minute 5:06
Photo (below) source: Wikipedia