Frederick Leigh Gardner (1857–1930) was a well-known British occultist who belonged to societies including the Hermetic Order of the Golden Dawn, the Freemasons, the Societas Rosicruciana in Anglia and the Theosophical Society. Born to spiritualist parents, Gardner worked as a stockbroker and later became an antiquarian bookseller. He planned a detailed catalogue of books on the occult sciences to cover Rosicrucian, astrological, Masonic and alchemical writings. Volume 4 was never published; the others were printed privately between 1903 and 1912 in runs of 300 copies each, and reprinted in 1923. This single-volume reissue of Gardner's important reference work contains the first editions of all three volumes, including the now extremely rare Volume 3. Introductions by Gardner's friend William Wynn Westcott (1848–1925), coroner, ceremonial magician, and Supreme Magus of the Rosicrucians of England, respectively cover the history of the Rosicrucians, the history of astrology, and English Masonic Lodge histories.