V. But it is conceivable, on the assumption of mind being a separate principle from matter, that the human soul may be capable of retaining its union with the body in a new, unusual, and abnormal relation. The hypothesis is startling enough. I adopt it only from seeing no other way of accounting for certain facts which, with the evidence of their reality, will presently be brought forward. I venture to suppose that the mind of a living man may energize abnormally in two ways: first, that a much larger share of its operations may be conducted exoneurally—that is, out of the body—than usual; secondly, that the esoneural mental functions may be conducted within the body in unaccustomed organs, deserting those naturally appropriated to them. Two or three instances have been already given, which favour, at all events, the supposition of the possibility of such an abnormal relation between the mind and the body being realized. But in most of the instances hitherto adverted to, the normal relation may be supposed to have remained. VI. Thus all the ordinary phenomena of sensorial illusions at once are esoneural, and suppose the persistence of the normal relation of mind and body. The material organ to which the physical agencies preceding sensation are propagated being irritated, is to be supposed to excite in the mind sensuous recollections or fancies that are so vivid as to appear realities. VII. In mental delusions, again, there is no reason for surmising the intervention of the abnormal relation. But what are mental delusions? They are a part of insanity. And what is insanity? I will summarily state its features; for some of the instances which remain for explanation are referrible to it, and because I delight to crush a volume into a paragraph.