On the Threshold of the Unseen

Focusing on the life and contributions of Sir William Fletcher Barrett, this biography highlights his role as a pioneering figure in psychical research and his tenure as Professor of Physics at the Royal College of Science for Dublin from 1873 to 1910. Notably, Barrett was a founding member of the Society for Psychical Research in 1882, where he held various leadership positions, including vice-president and president. His influence extended internationally as he encouraged William James to establish the American branch of the SPR in 1884.