This section is from the book "Human Personality And Its Survival Of Bodily Death", by Frederic W. H. Myers. Also available from Amazon: Human Personality And Its Survival Of Bodily Death.
Although B. I. knows nothing of Sally, Sally not only is conscious of Miss Beauchamp's thoughts at the moment they arise, but she is capable, as I have said, of controlling her thoughts and her arms and legs and tongue to a certain extent. Sally can produce positive and negative hallucination in B. I., and frequently does so for a practical joke. During the times when Sally is in existence, B. I. is - as Sally puts it - "dead," and these times represent complete gaps in Miss Beauchamp's memory, and she has no knowledge of them whatever. "What becomes of her?" Sally frequently asks. Sally is never "dead." Her memory is continuous; there are no gaps in it. She not only knows all B. I.'s thoughts and emotions and sensations, but will have a train of thought at the same time with B. I., of an entirely different nature. All this is also true of the relation of Sally's mind to that of the third personality - B. IV. - who came later, excepting that Sally does not know B. IV.'s thoughts. While either Miss B. I. or IV. is thinking and feeling one thing - is depressed and self-reproachful, for example - Sally is feeling gay and indifferent and enjoying Miss B.'s discomfiture and perhaps planning some amusement distasteful to her.
Speak to either B. I. or B. IV., and Sally hears you. Say something that Sally alone understands, and you see her smile. Then Sally remembers things in the past that B. I. knows nothing about at all, things that she apparently never was conscious of, or which she has completely forgotten. The most remarkable part of Sally's personality, I think, is that she has been able to write out for me her autobiography, beginning with the time when she was in her cradle, which she remembers. She actually describes her own thoughts and feelings as distinct from B. I.'s, all through her childhood, up to and including the present time; although, as she says, she never got an independent existence until she "got her eyes open." She remembers her cradle, draws a picture of the bars in its sides, and remembers what she, as distinct from Miss Beauchamp, thought at the time when she was learning to walk. Then B. I. was frightened and wanted to go back, but Sally was not at all frightened and wanted to go ahead. She describes B. I. as having had a butterfly mind as contrasted with her own.
She, as a small child, disliked the things that B. I. liked, and vice versā. She describes her school life, her own feelings when B. I. did things, and the different sensations of the two selves when, for example, B. I. was punished and felt badly, and she herself was entirely indifferent and without remorse. Thus I have been able to get an actual autobiography of a subliminal consciousness, in which are described the contemporaneous and contrasted mental lives of two consciousnesses, the subliminal and the dominant, from early infancy to adult life. In this Sally has described for me various scenes and incidents which occurred and which she saw during her early life, but of which Miss Beauchamp is entirely ignorant. These usually represent scenes which occurred while B. I. was absorbed in thought, but which Sally as a subliminal noticed. Taking all this into consideration - taking the present relations of Sally's thoughts to Miss Beauchamp's thought, and many other facts, like automatic writing, which Sally performs with ease, and uses for purposes of correspondence - I think we are safe in saying that Sally is the subliminal consciousness, which has become highly developed and organised and obtained finally an independent existence, and led an individual life of its own.
After Sally's escape from her mental Bastille, the two went on leading their independent lives, coming and going for a year or two, until one day, June 7th, 1899, an event occurred which had an influence upon the whole history of this case. To understand it, it is necessary to go back six years, to the year 1893. It appeared that in 1893 Miss Beauchamp was in a hospital in a neighbouring city, call it Providence. She had been taken with the fancy that she would like to be a nurse (it was the passion of her life), and in a fit of idealism she entered the hospital. One night she was sitting in her room with a friend, a Miss L., when, upon looking up, she was startled to see a face in the window. It was the face of an old friend of hers, a Mr. "Jones," as we have agreed to call him, whom she had known ever since she was a small girl, and who had been a sort of preceptor to her. At first she thought it was a hallucination, but she presently saw that it was a real person. She then hastily got her friend out of the room, and she went downstairs and out of the side door, where this person met her. It appeared that this person was in Providence on his way to New York, had wandered to the hospital, and seeing the ladder had climbed it for a joke, and looked into the window.
Outside the hospital door an exciting conversation occurred. It was to her of an intensely disturbing nature, and gave her a tremendous shock. Perhaps I should say here - as I have told so much of the story - that it was the kind of thing that upon the ordinary person would not have had much influence, but with her sensitive and idealistic nature she exaggerated it and gave it an intensity that an ordinary person would not have given to it. At any rate, it did give her a violent shock. The surroundings, too, were dramatic. It was night, and pitch dark, but a storm wae coming up, and great peals of thunder and flashes of lightning heightened the emotional effect. It was only by these flashes that she saw her companion. From that time she was changed. She went out and walked the fields at night by the hour; she became nervous, excitable, and neurasthenic, all her peculiarities became very much exaggerated and her character changed; she became unstable, developed aboulia, and, in other words, changed into B. I. So that B. I. - or, more correctly, Miss Beauchamp modified into B. I. - dates from the time of that scene outside the hospital that night.
 
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