B. IV. is a very different character from either Sally or Miss Beauchamp. A study of the different habits of thought, tastes, and emotions of these three people, has thrown, I believe, much light upon the psychology of character, but in this report I must limit myself to a mere outline of events. There were, of course, gaps in the memory of B. IV. (as with B. I.) corresponding to the time of the existence of the other two personalities. But this B. IV. was never willing to admit. Unlike the others, she is irritable and quick-tempered, and resented as an impertinence - especially as she regarded most of us as strangers any inquiry into her private thoughts and affairs, and above all any interference with her habits of life and private conduct. Though anxious to know, she was not willing to ask about what had occurred in the gaps when the others were in the flesh, and so was in the habit of inferring and guessing, at which she was very skilful. She was, as stated, even unwilling for a long time to admit that there were gaps, but it was easy to convict her here by a few questions.

After fibbing and inferring and guessing, she would break down and confess she did not know, which was the fact.

Now, Sally, although her mental life is also continuous during that of B. IV. (as with B. I.), and although she knows everything B. IV. does at the time she does it, hears what she says, reads what she writes, and sees what she does, nevertheless Sally does not know B. IV.'s thoughts. Herein is a very interesting psychological distinction between Sally's relation to B. I. and to B. IV. She knows B. I.'s inmost soul, she can only infer B. IV.'s thoughts from what she says and does. But Sally studied her closely, and soon discovered for herself that B. IV. knew nothing of the past six years, but was always secretly trying to obtain information, and guessing. Sally, in her astonishment, used to say, "Why, she doesn't know anything, she is always fishing and guessing." For this reason, Sally, until she learned to know B. IV. better, had a great contempt for her, and dubbed her the " Idiot," and whenever after this, she spoke of her, it was as the " Idiot." From this time on, Sally transferred her hatred from B. I. to the " Idiot." She came to regard B. I. as rather a poor sort of creature, and hardly worthy of her consideration anyway, and let her alone; but B. IV. became the object of her attacks. But B. IV. is more than a match for Sally, who is really afraid of her.

They quarrel like cats and dogs. One of the most curious and puzzling things was the cause of Sally's hatred of B. I. It was unmitigated jealousy. She was jealous of the attentions B. I. received, jealous of the fact that people liked B. I. and wanted to keep her in existence instead of herself, and therefore - difficult as it is to conceive of a person jealous of herself - Sally was immensely jealous of herself.

I have said that B. IV.'s memory ceases at Providence with seeing the face in the window. She can tell you nothing after that, and knows nothing of the scene outside the door. Both B. I. and Sally recall and describe similarly that scene, but the last thing B. IV. remembers is the face at the window a few minutes before.1 As one method of corroboration of these events, I produced in B. IV. a crystal vision.2 I gave her a glass globe to look at, and told her to think of Providence. As she looked into the glass she was horrified to see there the scene that took place outside the hospital door. She declared with much excitement that it was not true, that it never had occurred, and this she repeated again and again, and remonstrated against my believing it. Like B. I. in the library, she saw herself by flashes of lightning standing by the door with Jones. She saw his excited manner, and heard his voice between the peals of thunder. She saw it all as a vision, just as it occurred. She was startled by what she saw, and experienced over again all the emotion of the original scene....

Now the most interesting and most important question is, what is the relationship between all the personalities ? What relation do they bear to the normal personality, and, for that matter, which is the normal Miss Beauchamp, or is any one of them the real and normal individual ?... Sally has been sufficiently emphasised.... But B. I. and B. IV., who are they?

One thing must be insisted upon - namely, however normal each may appear superficially, neither is quite normal. In each are missing some of the attributes of the original Miss Beauchamp, but in B. I. the departure from the normal is the least. Her neurasthenic condition, her aboulia, her extreme suggestibility, by which negative hallucination can be produced at will, her exaggerated sensitiveness to emotional influences, like music and religion, which produce certain psychical phenomena, the dominion which ideas acquire in her mind, the exaggeration of certain traits always possessed by her, her tendency to disintegration, by which she at times loses temporarily certain acquirements, like the French language - these and other peculiarities are evidence that a certain amount of disintegration took place in 1893 by which the original personality became fractured and modified. Nevertheless, it would be an exaggeration to affirm that she is a wholly new and distinct personality, or that she is a vigilambulist. It is more correct to say that certain components of her personality have become disintegrated from the rest, certain local areas of her brain, as I have elsewhere put it,1 have gone to sleep.

The original self has become modified into B. I.

1 The lack of this knowledge was afterwards the cause of much trouble to B. IV., which was strong evidence of her ignorance.

2 A study of Visions based on this case may be found in Brain, 1898. See also Proceedings, S.P.R,. vol. xiv. pp. 366 et seq.

B. IV., notwithstanding her greater stability, is a still greater departure from the original self. Her character is totally different; her general attitude towards her environment has changed, for there is missing the taste for, that is, the normal reactions to music, literature, and religion. She has also lost her knowledge of music. She has no emotionability, excepting bad temper; in short, she has retained some characteristics and lost others of the original self.