The Book of Curiosities

by John Platts

It is altogether unnecessary to attempt an enumeration of the numerous hypothetical explanations which have been attempted to be given of the phenomenon of incubus, and which have been detailed by Awen, Bond, and other writers. The disorder has commonly been supposed to proceed from a stagnation of the blood in the sinuses of the brain, or in the vessels of the lungs, or from too great a quantity of blood being sent to the head. The horizontal posture, in time of sleep, and the pressure of the stomach upon the aorta, in a supine situation, have been thought sufficient to occasion a more than usual distention of the sinuses and other vessels of the brain; and the weight of the heart, pressing on the left auricle and large trunks of the pulmonary veins, may, it is supposed, prevent the easy return of the blood from the lungs, and thus produce an oppression and sense of weight and suffocation in the breast. But without entering into a particular examination of these opinions, which are far from being satisfactory, we may observe, with Dr. Whytt, that, if they were true, some degree of the nightmare ought to happen to every body that lies upon his back, especially after eating a full meal. Further, if a horizontal situation could overcharge the brain with blood, so as to occasion the incubus, how comes it that people, who remain for some time in an inverted posture, do not feel this disease beginning to attack them? And why does a slighter degree of the nightmare sometimes seize people who sleep in an erect situation in a chair? a circumstance which sometimes occurs, not only after eating, but when the stomach is out of order, and troubled with wind. As the weight of the stomach, even when filled with food, can have scarcely any effect upon the motion of the blood in the aorta, so the pressure of the heart is by much too small to be able sensibly to retard the motion of that fluid in the pulmonary veins; otherwise, people exhausted by tedious diseases, who generally lie on their back, would be constantly affected with the incubus.

We know that certain medicines or poisons, worms, and even corrupted bile, or other humours, by disagreeably affecting the nerves of the stomach, produce an oppression about the breast, wild imaginations, frightful dreams, raving, and insensibility; and there is no doubt that low spirits, melancholy, and disturbed sleep, often proceed from a disordered state of the stomach. It seems, therefore, more probable that the seat of nightmare is principally in that organ. It is well ascertained, that some forms of epilepsy, and of hysterical fits, originate from disorder in that viscus; and Galen considered the incubus as a nocturnal or slighter epilepsy. People troubled with nervous and hypochondriac affections, and who have delicate or flatulent stomachs, are more peculiarly subject to this disorder; and it is observed, that a heavy or flatulent supper greatly aggravates the nightmare, in those who are predisposed to it. The sympathy of the stomach with the head, heart, lungs, and diaphragm, is so remarkable, that there can be no difficulty in referring the several symptoms of the incubus to a disagreeable irritation of the nerves of the stomach.

The incubus is most apt to seize persons when lying on their back, because, in this position, on account of the stomach and other abdominal viscera pressing more upon the diaphragm, we cannot inspire with the same ease as when we sit up or lie on one side. Further, in that situation of the body the food seems to lie heavier on the stomach, and wind in it does not separate so readily by the æsophagus and pylorus, as in an erect posture, when these orifices are higher than the other parts of the stomach. The nightmare only occurs in the time of sleep, because the strange ideas excited in the mind, in consequence of the disordered feelings of the stomach, are not then corrected by the external senses, as they are when we are awake; nor do we, by an increased respiration or other motions of the body, endeavour to shake off any beginning uneasy sensation about the stomach or breast. The incubus generally occurs in the first sleep, and seldom towards morning, because at the earlier period the stomach is more loaded with food, and that in a more crude and indigested state than in the morning. A lesser degree, amounting only to frightful dreams, is almost a constant concomitant of overloaded stomach in some habits.

In fact, if the nightmare were owing to a stagnation of the blood in the lungs from the weight of the heart, or in the sinuses and other vessels of the brain, from the horizontal posture of the body, it would become greater the longer it continued, and would scarcely ever go off spontaneously. But we know that this disease, after affecting people for some time, often gradually ceases, and is succeeded by refreshing sleep: for as soon as the load of meat, or wind, or other cause disagreeably affecting the nerves of the stomach, is removed, the oppression and weight on the breast, wild imaginations, frightful dreams, &c. vanish; as all these proceed originally from the disorder of the stomach. It may be remarked, however, that, as neither flatulency, phlegm, nor crudities in the stomach, ever produce the symptoms of hypochondriasis, unless the nerves of that organ be indisposed; so neither a horizontal posture, sleep, nor heavy suppers, ever produce the nightmare, at least in any considerable degree, unless the person be already predisposed to the complaint, from the particular condition of the nerves of the stomach.

But although the stomach is the part commonly affected primarily in the case of incubus; yet symptoms like those of the nightmare may sometimes arise without any fault of the stomach, when the lungs, or even the brain, are affected. Thus Dr. Whytt observes, that asthmatic patients, whose lungs are much obstructed, are sometimes disturbed, in time of sleep, with distressing dreams, and oppressed with a sense of suffocation. Startings and oppressions about the præcordia, with painful dreams, are indeed common occurrences from hydrothorax, chronic coughs, and other pulmonary obstructions; but they are not strictly analogous to the common nightmare. Dr. Lower mentions a patient, who, though he could sleep pretty easily with his head inclined forward; yet, in the opposite situation, he was always soon awaked with horrid dreams and tremors; the cause of which appeared, after his death, to have been a great quantity of water in the ventricles of the brain. At all events, a plethoric state of habit, by rendering the circulation through the lungs less free, may help to produce, or at least increase, the oppression of the breast in the nightmare.

The Cure.—As incubus, then, is only a symptom of disordered or loaded stomach, and arises out of the irritation and morbid feelings which are thus produced during sleep, the relief of the disease, generally speaking, lies within a narrow compass. Temperance in eating and drinking, especially at late hours; taking, in fact, either extremely light suppers or none at all; and when the dinner is so late as to be only a supper with another name, being cautious that that also should be moderate in quantity, and easily digestible and unstimulating in its nature; drinking thin, sub-acid liquors, where these are agreeable to the constitution,—these are the principal remedies required. Brisk active exercise, by which the digestive powers may be aided and the stomach strengthened, is also advisable. It were useful, too, to sleep with high pillows, and to lie on the side as much as possible, in preference to the back. If the functions of the stomach are much disordered with flatulency, heartburn, acidity, or oppression, with pain, or nausea, after taking food, the usual remedies recommended for indigestion must be resorted to. The bowels should be kept open. See Whytt on Nervous Disorders, chap. vi. § 18.

Celebrated Speech on Religion.

The Editor of this work well recollects, many years ago, reading in a newspaper a most interesting speech on religion, delivered by a French priest; it made a great impression on his mind at the time, and he frequently regretted he had not transcribed it. He made all inquiry possible, but could not meet with the interesting article till seventeen years had elapsed, when it was published by a person who had preserved the paper in question. It is now presented to the reader as a curiosity worthy of his notice.—This speech was delivered at the Bar of the French Convention, and is copied from the Cambridge Intelligencer of March 24th, 1798.

A few days after the archbishop of Paris and his vicars had set the example of renouncing their clerical character, a rector from a village on the banks of the Rhone, followed by some of his parishioners, with an offering of gold and silver saints and chalices, rich vestments, &c. presented himself at the bar of the convention. The rector, a thin venerable-looking man, with gray hairs, was ordered to speak.

“I come (said he) from the village of ——, where the only good building standing is a very fine church: my parishioners beg you will take it, to make an hospital for the sick and wounded of both parties, they being both equally our countrymen. The gold and silver, part of which we have brought to you, they entreat you will devote to the service of the state, and that you will cast the bells into cannon, to drive away its foreign invaders. For myself, I came with great pleasure to resign my letters of ordination, of induction, and every deed and title by which I have been constituted a member of your ecclesiastical polity. Here are the papers; you may burn them, if you please, in the same fire with genealogical trees and patents of nobility. I desire, likewise, that you will discontinue my salary; I am still able to support myself by the labour of my hands, and I beg you to believe, that I never felt sincerer joy than I now do in making this renunciation. I have longed to see this day! I see it, and am glad.”