THIS History has already occupied a far larger space than I at first intended or anticipated.

Nevertheless, to bring it to the term marked out in my original preface–the close of the generation contemporary with Alexander, on whose reign we are about to enter–one more Volume will yet be required.

That Volume will include a review of Plato and Aristotle, so far as the limits of a general history permit. Plato, indeed, belonging to the period already described, is partially noticed in the present Volume; at an epoch of his life when, as counsellor of Dionysius II., he exercised positive action on the destinies of Syracuse. But I thought it more convenient to reserve the appreciation of his philosophical character and influence, until I could present him in juxtaposition with his pupil Aristotle, whose maturity falls within the generation now opening. These two distinguished thinkers will be found to throw light reciprocally upon each other, in their points both of contrast and similarity.