There is, however, a circumstance, which to my knowledge, has not been noticed by those who have treated on this subject, and which appears to establish a marked distinction between madness and dreaming. In madness, the delusion we experience is most frequently conveyed through the ear; in dreaming, the deception is commonly optical; we see much, and hear little; indeed dreaming, at least with myself, seems to be a species of intelligible pantomime, that does not require the aid of language to explain it. It is true, that some who have perfectly recovered from this disease, and who are persons of good understanding and liberal education, describe the state they were in, as resembling a dream: and when they have been told how long they were disordered, have been astonished that the time passed so rapidly away. But this only refers to that consciousness of delusion, which is admitted by the patient on his return to reason; in the same manner as the man awake, smiles at the incongruous images, and abrupt transitions of the preceding night. In neither condition, does the consciousness of delusion, establish any thing explanatory of the _state_ of the mind. In a description of madness, it would be blameable to omit a form of this disease which is commonly very intractable, and of the most alarming consequences; I mean, the insanity which arises from the habit of intoxication. All persons who have had any experience of this disease, readily allow that fermented liquors, taken to excess, are capable of producing mental derangement: but the medical practitioner has in such cases, to contend, and generally without effect, with popular prejudice, and sometimes, with the subordinate advisers of the law.