So, some say the sun may be dark as another planet; and that the spots on it are its common earth seen through the gaps in its luminous atmosphere.
To the world, the alpha and omega of this piece of philosophy were furnished by the publication of the case of Nicolai, the bookseller of Berlin. Its details were read before the Academy of Sciences at Berlin, in 1799. The substance ran thus. Nicolai had had some family troubles which much annoyed him. Then, on the 21st of February 1791, there stood before him, at the distance of ten paces, the ghost of his eldest son. He pointed at it, directing his wife to look. She saw it not, and tried to convince him that it was an illusion. In a quarter of an hour it vanished. In the afternoon, at four o'clock, it came again. Nicolai was alone. He went to his wife's room—the ghost followed him. About six other apparitions joined the first, and they walked about, among, and through each other. After some days the apparition of his son stayed away; but its place was filled with the figures of a number of persons, some known, some unknown to Nicolai—some of dead, others of living persons. The known ones were distant acquaintances only. The figures of none of Nicolai's habitual friends were there. The appearances were almost always human: exceptionally, a man on horseback, with dogs and birds would present themselves. The apparitions came mostly after dinner, at the commencement of digestion. They were just like real persons; the colouring a thought fainter. The apparitions were equally distinct whether Nicolai was alone or in society, by day as in the dark, in his own house or those of others; but in the latter case they were less frequent, and they very seldom presented themselves in the streets. During the first eight days they seemed to take very little notice of each other, but walked about like people at a fair, only here and there communing with each other. They took no notice of Nicolai, or of his remarks about them to his wife and physician. No effort of his would dismiss them, or bring an absent one back. When he shut his eyes, they sometimes disappeared, sometimes remained; when he opened his eyes, they were there as before. After a week they became more numerous, and began to converse. They conversed with each other, and then addressed him. Their remarks were short and unconnected, but sensible and civil. His acquaintances inquired after his health, and expressed sympathy for him, and spoke in terms comforting him. The apparitions were most conversible when he was alone; nevertheless they mingled in the conversation when others were by, and their voices had the same sound as those of real persons. This illusion went on thus from the 24th of February to the 20th of April; so that Nicolai, who was in good bodily health, had time to become tranquillised about them, and to observe them at his ease. At last they rather amused him. Then the doctors thought of an efficient plan of treatment. They prescribed leeches: and then followed the denouement to this interesting representation. The apparitions became pale and vanished. On the 20th of April, at the time of applying the leeches, Nicolai's room was full of figures moving about among each other. They first began to have a less lively motion; shortly afterwards their colours became paler—in another half hour fainter still, though the forms still remained. About seven o'clock in the evening, the figures had became colourless, and they moved scarcely at all, but their outline was still tolerably perfect. Gradually that became less and less defined. At last they disappeared, breaking into air, fragments only remaining, which at last all vanished. By eight o'clock all were gone, and Nicolai subsequently saw no more of them.
Other cases are on record in which there was still greater facility of ghost-production than Nicolai evinced. One patient could, for instance, by thinking of a person, summon his apparition to join the others. He could not, however, having done this, subsequently banish him. The sight is the sense most easily and frequently tricked; next, the hearing. In some extraordinary cases the touch, also, has participated in the delusion.
Herr von Baczko, already subject to visual hallucinations, of a diseased nervous system, his right side weak with palsy, his right eye blind, and the vision of the left imperfect, was engaged one evening, shortly after the battle of Jena, as he tells us in his autobiography, in translating a brochure into Polish, when he felt a poke in his loins. He looked round, and found that it proceeded from a Negro or Egyptian boy, seemingly about twelve years of age. Although he was persuaded the whole was an illusion, he thought it best to knock the apparition down, when he felt that it offered a sensible resistance. The Negro then attacked him on the other side, and gave his left arm a particularly disagreeable twist, when Baczko pushed him off again. The Negro continued to visit him constantly during four months, preserving the same appearance, and remaining tangible; then he came seldomer; and, after finally appearing as a brown-coloured apparition with an owl's head, he took his leave.
The illusion and its principle having been thus elucidated, it is hardly worth while to look into its operation in tales of vulgar terror. But it is highly interesting to trace its effects on minds of a high order, when its suggestions have been received and interpreted as the visits and communications of superior beings. You have heard, I dare say, my dear Archy, of the mysticism of Schwedenborg. Now that they are explained, the details of his hallucinations are highly gratifying to one's curiosity.
Schwedenborg, the son of a Swedish clergyman of the name of Schwedberg, ennobled as Schwedenborg, was, up to the year 1743, which was the fifty-fourth of his age, an ordinary man of the world, distinguished only in literature, having written many volumes of philosophy and science, and being Professor in the Mineralogical school, where he was much respected. On a sudden, in the year 1743, he believed himself to have got into a commerce with the world of spirits, which so fully took possession of his thoughts, that he not only published their revelations, but was in the habit of detailing, with the greatest equanimity, his daily chat with them. Thus he says, "I had a conversation the other day on that very point with the Apostle Paul," or with Luther, or some other dead person. Schwedenborg continued in what he believed to be daily communion with spirits till his death, in 1772. He was, without doubt, in the fullest degree convinced of the reality of his spiritual commerce. So in a letter to the Wirtemburg prelate, Oetinger, dated November 11, 1766, he uses the following words:—"If I have spoken with the Apostles? To this I answer, I conversed with St Paul during a whole year, particularly on the text, Romans iii. 28. I have three times conversed with St John, once with Moses, and a hundred times with Luther, who allowed that it was against the warning of an angel that he professed 'fidem solam,' and that he stood alone upon the separation from the Pope. With angels, finally, have I these twenty-two years conversed, and converse daily.
"Of the angels," he says, "they have human forms, the appearance of men that I have a thousand times seen; for I have spoken with them as a man with other men, often with several together; and have seen nothing in the least to distinguish them from ordinary men." [They had evidently just the appearance of Nicolai's visitors.] "Lest any one should call this an illusion, or imaginary perception, it is to be understood that I am accustomed to see them, when perfectly myself wide awake, and in full exercise of my observation. The speech of an angel or of a spirit sounds like, and as loud as, that of a man, but it is not heard by the bystanders; the reason is, that the speech of an angel or a spirit finds entrance first into a man's thoughts, and reaches his organs of hearing from within outwards." This is indeed cum ratione insanire! how just an analysis of the illusion, when he is most deceived by it!
"The angels who converse with men, speak not in their own language, but in the language of men, and likewise in other languages which are inwardly known to man, not in languages which he does not understand." Schwedenborg here took up the angels, and to explain their own ideas to them observed, that they most likely appeared to speak his mother tongue, because, in fact, it was not they who spoke, but himself by their suggestion. The angels held out, however, and went away unconvinced.
"When approaching, the angels often appear like a ball of light; and they travel in companies so grouped together—they are allowed so to unite by the Lord—that they may act as one being, and share each others' ideas and knowledge; and in this form they bound through the universe, from planet to planet."
I will, in conclusion, add another different, but equally interesting sketch.