Sir William Fletcher Barrett (February 10, 1844 - May 26, 1925) was Professor of Physics at the Royal College of Science for Dublin from 1873-1910 and one of the distinguished early psychical researchers. He was instrumental in the founding of the Society for Psychical Research (SPR) in 1882, serving as vice-president and editor of the Society"s Journal during its first year and he became president in 1904. He also encouraged Professor William James of Harvard to organize the American branch of the SPR. in 1884. First published in 1917, On the Threshold of the Unseen is Barrett"s examination of spiritualism, psychic phenomena, and life after death. Topics covered include, science and scepticism, automatic writing, clairvoyance, telepathy, direct voice, spirit photography, and much more. During his 50 years of psychical research, Barrett observed many types of psychic phenomena. Recalling his past experiences at a private meeting of the SPR on June 17, 1924, less than a year...