THREE:We now enter on the last period of purely objective philosophy, an age of mediating and reconciling, but still profoundly original speculation. Its principal representatives, with whom alone we have to deal, are Empedocles, the Atomists, Leucippus and Democritus, and Anaxagoras. There is considerable doubt and difficulty respecting the order in which they should be placed. Anaxagoras was unquestionably the oldest and Democritus the youngest of the four, the difference between their ages being forty years. It is also nearly certain that the Atomists came after Empedocles. But if we take a celebrated expression of Aristotles21 literally (as there is no reason why it should not be taken),27 Anaxagoras, although born before Empedocles, published his views at a later period. Was he also anticipated by Leucippus? We cannot tell with certainty, but it seems likely from a comparison of their doctrines that he was; and in all cases the man who naturalised philosophy in Athens, and who by his theory of a creative reason furnishes a transition to the age of subjective speculation, will be most conveniently placed at the close of the pre-Socratic period.The terrible thunder of the guns, of both besiegers and besieged, vibrated through the air. In the distance I noticed a couple of men, probably German soldiers, but a pontoon-bridge was nowhere to be seen. After a few minutes, however, I reached a spot where the Meuse makes a short curve, and had scarcely walked round it, when I saw, only a couple of hundred yards away, the bridge in question, across which a long train of vehicles was passing, loaded with victuals, hay, straw, etc.