Dr. Mitchell discusses several well-known cases of multiple personality, including the cases of: Ansel Bourne, Felida X, Mr. Hanna, Miss Beauchamp, Louis V, Mary Barnes, Madame B, and Milly P. The doctor then goes on to discuss how these secondary personalities can be formed and how it is possible for one personality to not be aware of the other personality. Dr. Mitchell takes on the view of these patients having co-conscious personalities, his reasoning is discussed in depth.
A young woman was treated for tremors and paralysis in the limbs, speech difficulties, high fevers and bleeding from the ears and eyes. Symptoms were not consistent with common diagnoses. Dr. Walker eventually communicated via hypnosis with two additional personalities; none of the three were initially able to recall actions of the others. The most child-like personality was reported by the primary personality as responsible for creating the symptoms. Walker was unable to obtain historic information which may have precipitated the symptoms. At conclusion of treatment, all symptoms had been alleviated but all three personalities continued to be accessible under hypnosis.