We have seen that criticism in Greece began from two different sources, neither of which, perhaps, was, or could have been expected to be, likely to supply it in an absolutely unmixed condition. There was, in the first place, the strong Greek philosophising tendency, working upon the earliest documents (the most important, then as now, identified with the name of Homer), and subjecting them to processes which oftenest took the form of a kind of rationalising allegory. The second was the invention, for more or less practical purposes, of the art of Rhetoric or Persuasive Composition. As, in the first place, the collection of written literature was very small, and as the oratorical character impressed itself more or less strongly upon nearly _all_ literature in the process of publication, this dominance of Oratory was long maintained, and continued, almost to the latest times, to prevent Rhetoric from assuming its proper etymological position as “speech-craft” in the widest sense, as the art of artificially arranged language. But this inconvenience, always more or less existing, was mitigated by practice in divers ways. As actual literature, both prose and verse, mustered and multiplied, and as it was more and more enjoyed by the keen Greek appetite for pleasures of all kinds, it at the same time presented more and more temptation to the equally keen Greek aptitude for philosophical inquiry. Larger and larger treasuries were made available for quotation and imitation; more and more kinds of literature were presented to the student for investigation, classification, inquiry into sources, methods, effects. And so after a century, or a century and a half, of progress and exercise, of which little remains to us except the brilliant, but from this point of view wayward, work of Plato, we are confronted, in the work of Aristotle, with an Art of Poetry, incomplete in certain ways, but singularly mature in its own way, with an Art of Prose which, though it has not yet by any means recognised its real nature and estate, and persists in regarding itself as an Art of Persuasion merely, has yet accumulated many valuable observations, and has made the paths of future investigators fairly straight and smooth.