Concerning my own experience, which comes under the class of natural ghost-seeing above mentioned, I may mention in good faith, that, if such phantoms were worth recalling, I could fill up an hour with the narration of those spectral sights and sounds which were most prominent among the illusions of my childhood. Sights and sounds were equally distinct and lifelike. I have run up-stairs obedient to a spectral call. Every successive night for a fortnight, my childish breath was stilled by the proceedings of a spectral rat, audible, never visible. It nightly, at the same hour, burst open a cupboard door, scampered across the floor, and shook the chair by my bedside. Wide awake and alone in the broad daylight, I have heard the voices of two nobodies gravely conversing, after the absurd dream fashion, in my room. Then as for spectral sights:--During the cholera of 1832, I, then a boy, walking in Holborn, saw in the sky the veritable flaming sword which I had learnt by heart out of a picture in an old folio of "Paradise Lost." And round the fiery sword there was a regular oval of blue sky to be seen through parted clouds. It was a fact not unimportant, that this phantom sword did not move with my eye, but remained for some time, apparently, only in one part of the heavens. I looked aside and lost it. When I looked back, there was the image still. These are hallucinations which arise from a disordered condition of the nervous system; they are the seeing or the hearing of what is not, and they are not by any means uncommon. Out of these there must, undoubtedly, arise a large number of well-attested stories of ghosts, seen by one person only. Such ghosts ought to excite no more terror than a twinge of rheumatism, or a nervous headache. There can be no doubt, however, that, in our minds or bodies, there are powers latent, or nearly latent, in the ordinary healthy man, which, in some peculiar constitutions, or under the influence of certain agents, or certain classes of disease, become active, and develope themselves in an extraordinary way. It is not very uncommon to find people who have acquired intuitive perception of each others' current thoughts, beyond what can be ascribed to community of interests, or comprehension of character.