The third class of dreams relates to the revival of forgotten associations. The person in question was at the time connected with one of the principal banks in Glasgow, and was at his place at the teller’s table, where money is paid, when a person entered demanding payment of a sum of six pounds. There were several people waiting, who were in turn entitled to be attended to before him; but he was remarkably impatient and rather noisy, and being besides a remarkable stammerer, he became so annoying, that another gentleman requested him to pay the money and get rid of him. He did so accordingly, but with an expression of impatience at being obliged to attend to him before his turn, and thought no more of the transaction. At the end of the year, which was eight or nine months after, the books of the bank could not be made to balance, the deficiency being exactly six pounds. Several days and nights had been spent in endeavouring to discover the error, but without success, when he returned home much fatigued, and went to bed. He dreamt of being at his place in the bank, and the whole transaction of the stammerer, as now detailed, passed before him in all its particulars. He awoke under the full impression that the dream would lead him to the discovery of what he was so anxiously in search of, and on examination he soon discovered that he had neglected to enter the sum which he had thus paid.
The following singular dreams are examples of the fourth class. A clergyman had come to Edinburgh from a short distance in the country, and was sleeping at an inn, when he dreamt of seeing a fire, and one of his children in the midst of it. He awoke with the impression, and instantly left town on his return home. When he arrived in sight of his house, he found it on fire, and got there in time to assist in saving one of his children, who in the alarm and confusion had been left in a situation of danger.
A gentleman in Edinburgh was affected with aneurism of the popliteal artery, for which he was under the care of two eminent surgeons, and the day was fixed for the operation. About two days before the appointed time, the wife of the patient dreamt that a favourable change had taken place in the disease, in consequence of which the operation would not be required. On examining the tumour in the morning, the gentleman was astonished to find that the pulsation had entirely ceased, and, in short, this turned out to be a spontaneous cure,—a very rare occurrence in surgical practice.
The following dream is still more remarkable. A lady dreamt that an aged female relative had been murdered by a black servant, and the dream occurred more than once. She was then so impressed by it, that she went to the house of the lady, and prevailed upon a gentleman to watch in an adjoining room during the following night. About three o’clock in the morning, the gentleman, hearing footsteps on the stairs, left his place of concealment, and met the servant carrying up a quantity of coals. Being questioned as to where he was going, he replied, in a hurried and confused manner, that he was going to mend his mistress’s fire, which at three o’clock in the morning in the middle of summer was evidently impossible; and, on further investigation, a strong knife was found concealed beneath the coals.
Dreams, to whatever causes they may be attributed, vary according to the nature of our sleep: if it is sound and natural, they will seldom prevail; if, on the contrary, it be broken and uneasy, by a spontaneous association dreams will become fanciful, and might indeed be called visions, so fantastic and chimerical are all the objects that present themselves in motley groups to the disturbed mind. This derangement in the sensorium may be referred to various physical causes,—the sensations of heat or of cold, obstruction in the course of the circulation of the blood, as when lying upon the back, a difficult digestion. In a sound sleep our dreams are seldom remembered except in a vague manner; whereas, in a broken sleep, as Formey has observed, the impression of the dream remains upon the mind, and constitutes what this philosopher called “the lucidity of dreams.” It not unfrequently happens to us that we have had a similar dream several times, or at least we labour under this impression; nay, many persons fancy that particular events of their life at the moment of their occurrence had clearly taken place at a former period either in reality or in a dream. Morning “winged dreams” are more easily remembered in their circumstantial vagaries than those of the preceding night, for at that period (the morning) our sleep is not sound, and dreams become more lucid. These rêvasseries, as the French call them, are admirably described by Dryden:
A dream o’ertook me at my waking hour
This morn, and dreams they say are then divine,
When all the balmy vapours are exhal’d,
And some o’erpow’ring god continues sleep.
That we are more or less impressionable in our sleep is rendered evident by the facility with which even a sound sleeper is disturbed by the slightest noise: the sparkling of a fire, or the crackling produced by the wick of our night-lamp when coming into contact with the water in the glass, the sting of an insect, the slightest admission of a higher or lower temperature, will occasion a broken sleep and its dreams. It has been remarked that the sense of seeing is more frequently acted upon in dreams than that of hearing, and very seldom do we find our smell and taste under their influence. It is possible that this peculiarity may arise from the greater variety of impressions with which the sight is daily struck, and which memory communicates by association or retransmission. Next to feeling, vision is the first sense brought into relation with external objects. When we hear noises, explosions, tumultuous cries, it is more than probable that our dreams partake of a delirious and morbid nature, or of sensorial or intellectual hallucinations, in which the mind is actually diseased, and our perceptions become erroneous: then we speak loudly to others, and to ourselves. When these hallucinations prevail after sleep, the invasion of mania may be apprehended.
Cabanis, in his curious investigations on the mind, has endeavoured to fix the order in which the different parts of our organization go to sleep. First the legs and arms, then the muscles that support the head and back: the first sense that slumbers, according to his notions, is that of sight; then follow in regular succession the senses of taste, smell, hearing, and feeling. The viscera fall asleep one after the other, but with different decrees of soundness. If this doctrine be correct, we may easily conceive the wild and strange inconsistencies of our dreams, during which the waking and the sleeping organs are acting and reacting upon each other.
Corporeal sensations and different organic actions frequently attend our dreams; but these may be attributed to our mode of living, or the indulgence in certain unruly desires and conversations. That man and animals dream of the pursuits of the preceding day there can be no doubt: hence the line,
Et canis in somnis leporis vestigia latrat.