So far as concerns the development of the patient's character, beyond a certain not very extensive ripening, no remarkable change could be demonstrated during the observations lasting nearly two years. More remarkable is the fact that in the two years since the cessation (complete?) of the somnambulic attacks, a considerable change in character has taken place. We shall have occasion later on to speak of the importance of this observation.
The continuity of consciousness which the patient presents in the individual attacks recalls the behaviour of the consciousness in MacNish's case; hence our case may be regarded as a transient phenomenon of alternating consciousness. The dreamlike hallucinatory content of the limited consciousness in our case does not, however, justify an unqualified assignment to this group of double consciousness.
The hallucinations in the second state show a certain creativeness which seems to be conditioned by the auto-suggestibility of this state. In Mesnet's case we noticed the appearance of hallucinatory processes from simple stimulation of touch. The patient's subconsciousness employs simple perceptions for the automatic construction of complicated scenes which then take possession of the limited consciousness. A somewhat similar view must be taken about our patient's hallucinations; at least, the external conditions which gave rise to the appearance of the hallucinations seem to strengthen our supposition.
These lapses of memory, which at first seem without content, gain a content by means of accidental auto-suggestion, and this content builds itself up automatically to a certain extent. It achieves no further development, probably on account of the improvement now beginning, and finally it disappears altogether as recovery sets in. Binet and Féré have made numerous experiments on the implanting of suggestions in states of partial sleep.