"A lady was once passing through a wood, in the darkening twilight of a stormy evening, to visit a friend who was watching over a dying child. The clouds were thick, the rain beginning to fall; darkness was increasing; the wind was moaning mournfully through the trees. The lady's heart almost failed her as she saw that she had a mile to walk through the woods in the gathering gloom. But the reflection of the situation of her friend forbade her turning back. Excited and trembling, she called to her aid a nervous resolution, and pressed onward. She had not proceeded far, when she beheld in the path before her the movement of some very indistinct object. It appeared to keep a little distance in advance of her, and as she made efforts to get nearer to see what it was, it seemed proportionally to recede. The lady began to feel rather unpleasantly. There was some pale white object certainly discernable before her, and it appeared mysteriously to float along at a regular distance without any effort at motion. Notwithstanding the lady's good sense and unusual resolution, a cold chill began to come over her; she made every effort to resist her fears, and soon succeeded in drawing nearer the mysterious object, when she was appalled at beholding the features of her friend's child, cold in death, wrapt in its shroud. She gazed earnestly, and then it remained distinct and clear before her eyes. She considered it a monition that her friend's child was dead, and that she must hasten on to her aid; but there was the apparition directly in her path; she must pass it. Taking up a little stick, she forced herself along to the object, and behold, some little animal scampered away. It was this that her excited imagination had transformed into the corpse of an infant in its winding-sheet."[48]

Sir Walter Scott relates an interesting case of illusion occasioned by an accidental arrangement of some articles of clothing:—

"Not long after the death of a late illustrious poet, who had filled, while living, a great station in the eye of the public, a literary friend, to whom the deceased had been well known, was engaged, during the darkening twilight of an autumn evening, in perusing one of the publications which professed to detail the habits and opinions of the distinguished individual who was now no more. As the reader had enjoyed the intimacy of the deceased to a considerable degree, he was deeply interested in the publication, which contained some particulars relating to himself and other friends. A visitor was sitting in the apartment who was also engaged in reading. Their sitting-room opened into an entrance-hall rather fantastically fitted up with articles of armour, skins of wild animals, and the like. It was when laying down his book, and passing into this hall, through which the moon was beginning to shine, that the individual of whom I speak saw, right before him, and in a standing position, the exact representation of his departed friend, whose recollection had been so strongly brought to his imagination. He stopped for a single moment, so as to notice the wonderful accuracy with which fancy had impressed upon the bodily eye the peculiarities of dress and posture of the illustrious poet. Sensible, however, of the delusion, he felt no sentiment save that of wonder at the extraordinary accuracy of the resemblance, and stepped onwards towards the figure, which resolved itself, as he approached, into the various materials of which it was composed. These were merely a screen, occupied by great-coats, shawls, plaids, and such other articles as usually are found in a country entrance-hall. The spectator returned to the spot from which he had seen the illusion, and endeavoured, with all his power, to recall the image which had been so singularly vivid. But this was beyond his capacity; and the person who had witnessed the apparition, or, more properly, whose excited state had been the means of raising it, had only to return, and tell the young friend he had left, under what a striking hallucination he had for a moment laboured."[49]

The liability to illusion or hallucination in that transitional state of the mind when it reverts to surrounding objects, after it has been pre-occupied with some absorbing and intense thought, is very strikingly shown in the above case. It is very similar to that condition of the mind which obtains between sleeping and waking, when it is well known that our dreams are most vivid and brilliant.

Dr. Ferriar relates the following interesting case of illusion occasioned by a ray of moonlight acting upon the mind of an individual just awaking from a horrid dream.

"A gentleman was benighted while travelling alone in a remote part of the highlands of Scotland, and was compelled to ask shelter for the night at a small lonely hut. When he was conducted to his bedroom, the landlady observed with mysterious reluctance, that he would find the window very insecure. On examination, part of the wall appeared to have been broken down to enlarge the opening. After some inquiry, he was told, that a pedlar, who had lodged in the room a short time before, had committed suicide, and was found hanging behind the door in the morning.

"According to one of the superstitions of the country, it was deemed improper to remove the body through the door of the house; and to convey it through the window was impossible without removing part of the wall. Some hints were dropped that the room had been subsequently haunted by the poor man's spirit.

"My friend laid his arms, properly prepared against intrusion of any kind, by the bedside, and retired to rest, not without some degree of apprehension. He was visited in a dream by a frightful apparition, and awaking in agony, found himself sitting up in bed with a pistol grasped in his right hand. On casting a fearful glance round the room, he discovered, by the moonlight, a corpse dressed in a shroud, leaned against the wall close by the window. With much difficulty he summoned up resolution to approach the dismal object, the features of which, and the minutest parts of the funeral apparel, he perceived distinctly. He passed one hand over it, felt nothing, and staggered back to the bed. After a long interval, and much reasoning with himself, he renewed his investigation, and at length discovered that the object of his terrors was produced by the moonbeams forming a long bright image through the broken window, on which his fancy, impressed by his dream, had produced with mischievous accuracy, the lineaments of a body prepared for interment."