Then for the first time she is allowed to help herself to the faculties and senses usually monopolised by the Conscious Self.

But like the timid and submissive inmate of the zenana suddenly delivered from the thraldom of her life-long partner, she immediately falls under the control of another.

The Conscious Personality of another person exercises over her the same supreme authority that her own Conscious Personality did formerly.
There is nothing of sex in the ordinary material sense about the two personalities.

But their union is so close as to suggest that the intrusion of the hypnotist is equivalent to an intrigue with a married woman.

The Sub-conscious Personality is no longer faithful exclusively to its natural partner; it is under the control of the Conscious Personality of another; and in the latter case the dictator seems to be irresistibly over-riding for a time all the efforts of the Conscious Personality to recover its authority in its own domain.
What proof, it will be asked impatiently, is there for the splitting of our personality?
The question is a just one, and I proceed to answer it.
There are often to be found in the records of lunatic asylums strange instances of a dual personality, in which there appear to be two minds in one body, as there are sometimes two yolks in one egg.
In the _Revue des Deux Mondes_, M.Jules Janet records the following experiment which, although simplicity itself, gives us a very vivid glimpse of a most appalling complex problem:-- "An hysterical subject with an insensitive limb is put to sleep, and is told, 'After you wake you will raise your finger when you mean Yes, and you will put it down when you mean No, in answer to the questions which I shall ask you.' The subject is then wakened, and M.Janet pricks the insensitive limb in several places.