It is, indeed, much easier to describe what is not humour than what is; and very difficult to define it otherwise than as Cowley has done wit, by negatives. Were I to give my own notions of it, I would deliver them after Plato's manner, in a kind of allegory, and, by supposing Humour to be a person, deduce to him all his qualifications, according to the following genealogy. Truth was the founder of the family, and the father of Good Sense. Good Sense was the father of Wit, who married a lady of a collateral line called Mirth, by whom he had issue Humour. Humour therefore being the youngest of this illustrious family, and descended from parents of such different dispositions, is very various and unequal in his temper; sometimes you see him putting on grave looks and a solemn habit, sometimes airy in his behaviour and fantastic in his dress; insomuch that at different times he appears as serious as a judge, and as jocular as a merry-andrew. But, as he has a great deal of the mother in his constitution, whatever mood he is in, he never fails to make his company laugh. But since there is an impostor abroad, who takes upon him the name of this young gentleman, and would willingly pass for him in the world; to the end that well-meaning persons may not be imposed upon by cheats, I would desire my readers, when they meet with this pretender, to look into his parentage, and to examine him strictly, whether or no he be remotely allied to Truth, and lineally descended from Good Sense; if not, they may conclude him a counterfeit. They may likewise distinguish him by a loud and excessive laughter, in which he seldom gets his company to join with him. For as True Humour generally looks serious while everybody laughs about him, False Humour is always laughing whilst everybody about him looks serious. I shall only add, if he has not in him a mixture of both parents--that is, if he would pass for the offspring of Wit without Mirth, or Mirth without Wit, you may conclude him to be altogether spurious and a cheat. The impostor of whom I am speaking descends originally from Falsehood, who was the mother of Nonsense, who was brought to bed of a son called Phrensy, who married one of the daughters of Folly, commonly known by the name of Laughter, on whom he begot that monstrous infant of which I have been here speaking. I shall set down at length the genealogical table of False Humour, and, at the same time, place under it the genealogy of True Humour, that the reader may at one view behold their different pedigrees and relations:-- Falsehood. Nonsense. Phrensy.--Laughter. False Humour. Truth. Good Sense. Wit.--Mirth, Humour.