I come now to the exemplification of full-waking in trance, as it is very perfectly manifested in the cases which have been termed double consciousness. These are in their principle very simple; but it is not easy in a few words to convey a distinct idea of the condition of the patient. The case consists of a series of fits of trance, in which the step from ordinary waking to full trance-waking is sudden and immediate, or nearly so, and either was so originally, or through use has become so. Generally for some hours on each day, occasionally for days together, the patient continues in the state of trance; then suddenly reverts to that of ordinary waking. In the perfectest instances of double consciousness, there is nothing in the bearing or behaviour of the entranced person which would lead a stranger to suppose her (for it is an affection far commoner in young women than in boys or men) to be other than ordinarily awaked. But her friends observe that she does every thing with more spirit and better--sings better, plays better, has more readiness, moves even more gracefully, than in her natural state. She has an innocent boldness and disregard of little conventionalisms, which imparts a peculiar charm to her behaviour. In the mean time, she has two complete existences separate and apart, which alternate but never mingle. On the day of her first fit, her life split into a double series of thoughts and recollections. She remembers in her ordinary state nothing of her trance existence. In her trances, she remembers nothing of the intervening hours of ordinary waking. Her recollections of what she had experienced or learned before the fits began is singularly capricious, differing extraordinarily in its extent in different cases. In general, the positive recollection of prior events is annulled; but her prior affections and habits either remain, and her general acquirements, or they are quickly by association rekindled or brought into the circle of her trance ideas. Generally she names all her friends anew; often her tone of voice is a little altered; sometimes she introduces with particular combinations of letters some odd inflection, which she maintains rigorously and cannot unlearn. Keeping before him this conception, the reader will comprehend the following sketch of a case of double consciousness, communicated by Dr George Barlow. To one reading them without preparation, the details, which are very graphic and instructive, would appear mere confusion:--