In the last September number of the “Archives de Neurologie,” M. Jules Voisin, of the Hôpital Bicêtre, has published an interesting account of “A case of hysteria major in a man with Double Personality.” The patient had before that attracted some notice in France for the same symptoms, and M. Camuset (of the Bonneval Asylum) has published a description of his very unusual state in 1880 and 1881 (Annales Médico-Psych., 1882, p. 75). Some important additions to our knowledge have been made by MM. Bourru and Burot (of Rochefort), of which the chief have been published in the “Revue Philosophique,” Oct., 1885, and “Arch, de Neurol.” Nov., 1885, and we may expect to see more in the “Annales Médico-Psychologiques.” They have very kindly allowed us to use some recent observations which they have privately sent us, and it has seemed a good opportunity for a brief retrospect of the whole case.