A c.1930 reprint of the original 1892 edition by the Theosophical Publishing Society. Featuring an encyclopedia of theosophical and occult terminology. Helena Petrovna (H.P.) Blavatsky, often known as Madame Blavatsky, was a Russian mystic and author who co-founded the Theosophical Society in 1875. She gained an international following as the leading theoretician of Theosophy.