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he had been doing he would assert that he had been asleep。 His language assumed a refinement above his ordinary discourse。 In proportion as his nervous system became composed； and his strength improved； this unnatural manifestation of consciousness disappeared； and he ultimately regained his health。
A further example of this psychologic phenomenon was furnished quite meetly at a meeting of the Clinical Society of London； where a well known physician exhibited a girl of twelve； belonging to a family of good standing； who displayed in the most complete and indubitable form this condition of dual existence。 A description of the case is as follows：
〃Last year； after a severe illness which was diagnosed to be meningitis； she became subject to temporary attacks of unconsciousness； on awakening from which she appeared in an entirely different character。 In her normal condition she could read and write and speak fluently； and with comparative correctness。 In the altered mental condition following the attack she loses all memory for ordinary events； though she can recall things that have taken place during previous attacks。 So complete is this alteration of memory； that at first she was unable to remember her own name or to identify herself or her parents。 By patient training in the abnormal condition she has been enabled to give things their names； though she still preserves a baby…fashion of pronouncing。 She sometimes remains in the abnormal condition for days together and the change to her real self takes place suddenly； without exciting surprise or dismay； and she forthwith resumes possession of her memory for events of her ordinary life。 During the last month or two she appears to have entered on a new phase； for after a mental blank of a fortnight's duration she awakened completely oblivious of all that had happened since June； 1895； and she alludes to events that took place just anterior to that date as though they were of recent occurrence； in fact she is living mentally in July； 1895。 These cases； though rare； are of course not infrequently met with； and they have been carefully studied； especially in France； where women appear more prone to neurotic manifestations。 The hypothesis that finds most favor is that the two halves of the brain do not work in unison； in other words； that there has been some interference with the connections which in the ordinary normal being make of a wonderful composite organ like the brain one organic whole。〃
Proust tells a story of a Parisian barrister of thirty…three。 His father was a heavy drinker； his mother subject to nervous attacks； his younger brother mentally deficient； and the patient himself was very impressionable。 It was said that a judge in a court； by fixing his gaze on him； could send him into an abnormal state。 On one occasion； while looking into a mirror in a cafe； he suddenly fell into a sleep； and was taken to the Charite where he was awakened。 He suffered occasional loss of memory for considerable lengths of time； and underwent a change of personality during these times。 Though wide awake in such conditions he could remember nothing of his past life； and when returned to his original state he could remember nothing that occurred during his secondary state； having virtually two distinct memories。 On September 23； 1888； he quarreled with his stepfather in Paris and became his second self for three weeks。 He found himself in a village 100 miles from Paris； remembering nothing about his journey thereto； but on inquiry he found that he had paid a visit to the priest of the village who thought his conduct odd； and he had previously stayed with an uncle； a bishop； in whose house he had broken furniture； torn up letters； and had even had sentence passed upon him by a police court for misdemeanor。 During these three weeks he had spent the equivalent of 100； but he could not recall a single item of expenditure。 Davies cites a remarkable case of sudden loss of memory in a man who； while on his way to Australia； was found by the police in an exhausted condition and who was confined in the Kent County Insane Asylum。 He suffered absolute loss of all memory with the exception of the names of two men not close acquaintances； both of whom failed to recognize him in his changed condition in confinement。 Four months later his memory returned and his identity was established。
In the Revue Philosophique for 1885 there are the details of a case of a young man who seemed able to assume six states of what might be fairly called different personalities。 The memories attached to each of these states were very different； though only one was completely exclusive of the others。 The handwriting varied from complete competence to complete incompetence。 His character varied between childish timidity； courteous reserve； and reckless arrogance； and to four of his conditions there was a form of hysteric paralysis attached。 Mere suggestion would not only induce any one of these varied forms of paralysis； but also the memories； capacities； and characters habitually accompanying it。
A young man named Spencer； an inmate of the Philadelphia Hospital； was exhibited before the American Neurological Society in June； 1896； as an example of dual personality。 At the time of writing he is and has been in apparently perfect health； with no evidence of having been in any other condition。 His faculties seem perfect； his education manifests itself in his intelligent performance of the cleric duties assigned to him at the hospital； yet the thread of continuous recollection which connects the present moment with its predecessorsconsciousness and memoryhas evidently been snapped at some point of time prior to March 3d and after January 19th； the last date at which he wrote to his parents； and as if in a dream； he is now living another life。 The hospital staff generally believe that the man is not 〃shamming；〃 as many circumstances seem to preclude that theory。 His memory is perfect as to everything back to March 3d。 The theory of hypnotism was advanced in explanation of this case。
The morbid sympathy of twin brothers； illustrated in Dumas's 〃Corsican Brothers；〃 has been discussed by Sedgwick； Elliotson； Trousseau； Laycock； Cagentre； and others。 Marshall Hall relates what would seem to verify the Corsican myth； the history of twin brothers nine months of age； who always became simultaneously affected with restlessness； whooping and crowing in breathing three weeks previous to simultaneous convulsions； etc。 Rush describes a case of twin brothers dwelling in entirely different places； who had the same impulse at the same time； and who eventually committed suicide synchronously。 Baunir describes a similar development of suicidal tendency in twin brothers。 A peculiar case of this kind was that of the twin brothers Laustand who were nurses in a hospital at Bordeaux； they invariably became ill at the same time； and suffered cataract of the lens together。
Automatism has been noticed as a sequel to cranial injuries； and Huxley quotes a remarkable case reported by Mesnet。 The patient was a young man whose parietal bone was partially destroyed by a ball。 He exhibited signs of hemiplegia on the right side； but these soon dis