A military officer and civilian superintendent of the École Polytechnique in Paris, Albert de Rochas became one of the best known psychic researchers in late nineteenth century France. His interests centered on uncovering the laws behind psychic forces, somnambulism, magnetism and mesmerism, hypnotism, perception, and reincarnation. A prolific writer, he studied a number of Spiritualist and Spiritist mediums, including Maria Mayo (Lina), Eusapia Paladino, and D. D. Home. Despite the relatively small size of the collection, the papers of Albert de Rochas open an important window onto the development of psychic science in fin de siecle France and onto the cultural impact of Spiritualism. The collection includes a scattered, but valuable selection of correspondence with fellow psychic researchers, editors, mediums, and other individuals interested in psychic research, and a valuable set of 69 spirit and psychic photographs, that Rochas collected as evidence of psychic forces, and as documentation of séances, mediums, and "sensitives." Rochas' work on the exteriorization of sensibility and studies of Lina, Charles Bailey, and Paladino are relatively well documented, and his interests in the laws of psychic phenomena, reincarnation, and the exmigration of the living soul run throughout.