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This is the second work that has appeared within two years on the interesting subject of multiple personality and, like the previous one, it is based on the observations of a single case. The present volume is more thoroughly a case report, and the subject has been already introduced to the medical reader in one or two preliminary articles by the author. The patient certainly was an extraordinary instance of a peculiar condition. There were three principal personalities: B I, a saintly neurasthenic; B III, a mischievous, childish character, and B IV, who was a later appearance, a more normal individual, but yet not the real Miss Beauchamp, which name the author gives to the subject of his study. B I was unconscious of everything done by the personality B III and B IV. B IV was similarly amnesic of the ideas and sensory experiences of B I and B
The Dissociation of a Personality. A Biographical Study in Abnormal Psychology.. JAMA. 1907;XLVIII(7):635. doi:10.1001/jama.1907.02520330077028