Jonson’s plays both eccentricity and normal behaviour are derived from a dominating characteristic, so that the result is a live, truthfully conceived personage in whom the ruling passion traces itself plainly. The later plays, for example, have characters whose behaviour is dominated by one psychological idiosyncrasy. But Jonson did not deal exclusively in “humours.” In some of his plays (notably Every Man in His Humour), the stock types of Latin comedy contributed as much as the humours theory did. What the theory provided for him and for his contemporaries was a convenient mode of distinguishing among human beings. The distinctions so made could be based on the “humours,” on Latin comic types, or, as in Volpone, in the assimilation of humans to different members of the animal kingdom. The characters Volpone, Mosca, Sir Epicure Mammon, Face, Subtle, Dol Common, Overdo, and Ursula are not simply “humours”; they are glorious type figures, so vitally rendered as to take on a being that transcends the type. This method was one of simplification, of typification, and yet also of vitalization.