Schroeder von der Kalk[58] reports on the following case: The patient became ill at the age of sixteen with periodic amnesia, after a previous tedious illness of three years. Sometimes in the morning after waking she passed through a peculiar choreic state, during which she made rhythmical movements with her arms. Throughout the whole day she would then exhibit a childish, silly behaviour and lost all her educated capabilities. (When normal she is very intelligent, well-read, speaks French well.) In the second state she begins to speak faulty French. On the second day she is again at times normal. The two states are completely separated by amnesia.[59] Hoefelt[60] reports on a case of spontaneous somnambulism in a girl who, in her normal state, was submissive and modest, but in somnambulism was impertinent, rude and violent. Azam's[61] Felida was, in her normal state, depressed, inhibited, timid; and in the second state lively, confident, enterprising to recklessness. _The second state gradually became the chief one, and finally so far suppressed the first state that the patient called her normal states, lasting now but a short time, "crises."_ The amnesic attacks had begun at 14 1/2. In time the second state became milder and there was a certain approximation between the character of the two states. A very striking example of change in character is that worked out by Camuset, Ribot, Legrand du Saulle, Richer, Voisin, and put together by Bourru and Burot.[62] It is that of Louis V., a severe male hysteric with amnesic alternating character. In the first stage he is rude, cheeky, querulous, greedy, thievish, inconsiderate. In the second state he is an agreeable, sympathetic character, industrious, docile and obedient. This amnesic change of character has been used by Paul Lindau[63] in his drama "Der Andere" (The Other One). Rieger[64] reports on a case parallel to Lindau's criminal lawyer. The unconscious personalities of Janet's Lucie and Léonie (Janet, _l.c._) and Morton Prince's[65] may also be regarded as parallel with our case. There are, however, therapeutic artificial products whose importance lies in the domain of the dissociation of consciousness and of memory. In the above cases, the second state is always separated from the first by an amnesic dissociation, and the change in character is, at times, accompanied by a break in the continuity of consciousness. In our case there is no amnesic disturbance; the passage from the first to the second stage follows quite gradually and the continuity of consciousness remains. The patient carries out in her waking state everything, otherwise unknown to her, from the field of the unconscious that she has experienced during hallucinations in the second stage.