Thomas Walker Mitchell 
Revival: Medical Psychology and Psychical Research (1922) [PDF ebook] 

This book deals with those branches of Medical Psychology which have thrown most light on the problems of Psychical Research, namely, Hypnotism, Hysteria, and Multiple Personality. The greater part of the contents had already been published in the forms of papers contributed to the Proceedings of the Society for Psychical Research between 1910 and 1922 when the book was first released.