More than one learned physician, who have given their attestations to the existence of this most distressing complaint, have agreed that it actually occurs, and is occasioned by different causes. The most frequent source of the malady is in the dissipated and intemperate habits of those who, by a continued series of intoxication, become subject to what is popularly called the Blue Devils, instances of which mental disorder may be known to most who have lived for any period of their lives in society where hard drinking was a common vice. The joyous visions suggested by intoxication when the habit is first acquired, in time disappear, and are supplied by frightful impressions and scenes, which destroy the tranquillity of the unhappy debauchee. Apparitions of the most unpleasant appearance are his companions in solitude, and intrude even upon his hours of society: and when by an alteration of habits, the mind is cleared of these frightful ideas, it requires but the slightest renewal of the association to bring back the full tide of misery upon the repentant libertine.
Of this the following instance was told to the author by a gentleman connected with the sufferer. A young man of fortune, who had led what is called so gay a life as considerably to injure both his health and fortune, was at length obliged to consult the physician upon the means of restoring, at least, the former. One of his principal complaints was the frequent presence of a set of apparitions, resembling a band of figures dressed in green, who performed in his drawing-room a singular dance, to which he was compelled to bear witness, though he knew, to his great annoyance, that the whole _corps de ballet_ existed only in his own imagination. His physician immediately informed him that he had lived upon town too long and too fast not to require an exchange to a more healthy and natural course of life. He therefore prescribed a gentle course of medicine, but earnestly recommended to his patient to retire to his own house in the country, observe a temperate diet and early hours, practising regular exercise, on the same principle avoiding fatigue, and assured him that by doing so he might bid adieu to black spirits and white, blue, green, and grey, with all their trumpery. The patient observed the advice, and prospered. His physician, after the interval of a month, received a grateful letter from him, acknowledging the success of his regimen. The greens goblins had disappeared, and with them the unpleasant train of emotions to which their visits had given rise, and the patient had ordered his town-house to be disfurnished and sold, while the furniture was to be sent down to his residence in the country, where he was determined in future to spend his life, without exposing himself to the temptations of town. One would have supposed this a well-devised scheme for health. But, alas! no sooner had the furniture of the London drawing-room been placed in order in the gallery of the old manor-house, than the former delusion returned in full force: the green _figurantés_, whom the patient's depraved imagination had so long associated with these moveables, came capering and frisking to accompany them, exclaiming with great glee, as if the sufferer should have been rejoiced to see them, "Here we all are--here we all are!" The visionary, if I recollect right, was so much shocked at their appearance, that he retired abroad, in despair that any part of Britain could shelter him from the daily persecution of this domestic ballet.