"His clairvoyant investigations went on to produce books of wide ranging appeal which brought many thousands of people in contact with the uplifting teachings of Theosophy. They include The Astral Plane, Thought-Forms (with Annie Besant), Man, Visible and Invisible, The Science of the Sacraments, The Masters and the Path, Hidden Life in Freemasonry, The Inner Life, The Chakras and The Hidden Side of Things, among several others."