"The Tale of a Tub," were indignant at the attempt to impose boiled oatmeal upon them, instead of such a banquet as Ude would have displayed when peers were to partake of it. Here, therefore, is one instance of actual insanity, in which the sense of taste controlled and attempted to restrain the ideal hypothesis adopted by a deranged imagination. But the disorder to which I previously alluded is entirely of a bodily character, and consists principally in a disease of the visual organs, which present to the patient a set of spectres or appearances which have no actual existence. It is a disease of the same nature which renders many men incapable of distinguishing colours; only the patients go a step further, and pervert the external form of objects. In their case, therefore, contrary to that of the maniac, it is not the mind, or rather the imagination, which imposes upon and overpowers the evidence of the senses, but the sense of seeing (or hearing) which betrays its duty and conveys false ideas to a sane intellect. 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.