George Nugent Merle Tyrrell, best known as G. N. M. Tyrrell, was a British mathematician, physicist, radio engineer and parapsychologist. The Personality of Man explains, in a non-technical way, the present position of psychical research and summarises the results It has so far gained. It explains the various techniques that have been worked out for personality investigation, gives numerous samples of the evidence that has been collected pointing to the possibility of telepathy., foreknowledge, survival after death, and so on.