It will aid our purpose to relate the following instance of Mr Nicolai, an intelligent bookseller and member of the Academy of Sciences of Berlin, who happily possessed philosophy enough to account for the phantasms which, for some time agitated his own mind, upon rational principles. 'In the year 1791, I was much affected in my mind by several incidents of a very disagreeable nature; and on a certain day a circumstance occurred, which irritated me extremely. At ten o'clock in the forenoon, my wife and another person came to console me. I was in a violent perturbation of mind, owing to a series of incidents which had altogether wounded my moral feelings, and from which I saw no possibility of relief; when suddenly I observed at the distance of ten paces from me, a figure; the figure of a deceased person. I pointed at it, and asked my wife if she did not see it. She saw nothing; but being much alarmed, endeavored to compose me, and sent for the physician. The figure remained seven or eight minutes, and at length I became a little more calm; and as I was extremely exhausted, I soon afterwards fell into a troubled kind of slumber, which lasted for half an hour. The vision was ascribed to the great agitation of mind in which I had been, and it was supposed I should have nothing more to apprehend from that cause; but the violent affection had put my nerves into some unnatural state; from this arose further consequences which require a more detailed description. In the afternoon a little after four o'clock, the figure which I had seen in the morning again appeared. I was alone when this happened, a circumstance, which, as may easily be conceived, could not be very agreeable. I went therefore to the apartment of my wife, to whom I related it. But thither also the figure pursued me. Sometimes it was present, sometimes it vanished, but it was always the same standing figure. A little after six o'clock, several stalking figures also appeared, but they had no connexion with the standing figure. The figure of the deceased person never appeared to me after the first dreadful day; but several other figures showed themselves afterwards very distinctly; sometimes such as I knew, mostly however, of persons I did not know, and amongst those known to me, were the semblance of both living and deceased persons, but mostly the former; and I made the observation, that acquaintance with whom I daily conversed never appeared to me as phantasms; it was always such as were at a distance. These figures appeared to me at all times, and under the most different circumstances, equally distinct and clear. Whether I was alone or in company, by broad day light equally as in the night time, in my own house as well as in my neighbor's; yet, when I was at another person's house, they were less frequent, and when I walked the public street, they very seldom appeared. When I shut my eyes, sometimes the figures disappeared, sometimes they remained even after I closed them.