But under Darius, at least, these mighty officers were curbed and kept in awe by the periodical visits of the king himself, or his commissioners; while a broad road, from the western coast to the Persian capital--inns, that received the messengers, and couriers, that transmitted the commands of the king, brought the more distant provinces within the reach of ready intelligence and vigilant control. These latter improvements were well calculated to quicken the stagnant languor habitual to the overgrowth of eastern empire. Nor was the reign of Darius undistinguished by the cultivation of the more elegant arts--since to that period may be referred, if not the foundation, at least the embellishment and increase of Persepolis. The remains of the palace of Chil-Menar, ascribed by modern superstition to the architecture of genii, its graceful columns, its mighty masonry, its terrace-flights, its marble basins, its sculptured designs stamped with the unmistakeable emblems of the magian faith, sufficiently evince that the shepherd-soldiery of Cyrus had already learned to appreciate and employ the most elaborate arts of the subjugated Medes. During this epoch, too, was founded a more regular military system, by the institution of conscriptions--while the subjection of the skilful sailors of Phoenicia, and of the great maritime cities of Asiatic Greece, brought to the Persian warfare the new arm of a numerous and experienced navy. V. The reign of Darius is also remarkable for the influence which Grecian strangers began to assume in the Persian court--and the fatal and promiscuous admission of Grecian mercenaries into the Persian service. The manners of the Persians were naturally hospitable, and Darius possessed not only an affable temper, but an inquisitive mind. A Greek physician of Crotona, who succeeded in relieving the king from the effects of a painful accident which had baffled the Egyptian practitioners, esteemed the most skilful the court possessed, naturally rose into an important personage. His reputation was increased by a more difficult cure upon the person of Atossa, the daughter of Cyrus, who, from the arms of her brother Cambyses, and those of the magian impostor, passed to the royal marriage-bed. And the physician, though desirous only of returning through some pretext to his own country, perhaps first inflamed the Persian king with the ill-starred wish of annexing Greece to his dominions. He despatched a commission with the physician himself, to report on the affairs of Greece. Many Hellenic adventurers were at that time scattered over the empire, some who had served with Cambyses, others who had sided with the Egyptians. Their valour recommended them to a valiant people, and their singular genius for intrigue took root in every soil. Syloson, a Greek of Samos, brother to Polycrates, the tyrant of that state, who, after a career of unexampled felicity and renown,