In pursuance of their policy, the Persians extended their dominion to Cyrene and Barca on the south, as well as to Thrace and Macedonia on the north. The Persian wars gave rise to that wonderful development in Greek art which has so worthily excited the admiration of subsequent ages. The assertion is quite true that after those wars the Greeks could form in sculpture living men. On the part of the Persians, these military undertakings were not of the base kind so common in antiquity; they were the carrying out of a policy conceived with great ability, their object being to obtain countries for tribute and not for devastation. The great critic Niebuhr, by whose opinions I am guided in the views I express of these events, admits that the Greek accounts, when examined, present little that was possible. The Persian empire does not seem to have suffered at all; and Plato, whose opinion must be considered as of very great authority, says that, on the whole, the Persian wars reflect extremely little honour on the Greeks. It was asserted that only thirty-one towns, and most of them small ones, were faithful to Greece. Treason to her seems for years in succession to have infected all her ablest men. It was not Pausanias alone who wanted to be king under the supremacy of Persia. Such a satrap would have borne about the same relation to the great king as the modern pacha does to the grand seignior. However, we must do justice to those able men. A king was what Greece in reality required; had she secured one at this time strong enough to hold her conflicting interests in check, she would have become the mistress of the world. Her leading men saw this. [Sidenote: The consequence is her vast intellectual progress.] [Sidenote: Her progress in art.]