In addition to all these works, the indefatigable monarch seems to have either rebuilt or repaired almost every city and temple throughout the entire country. There are said to be at least a hundred sites in the tract immediately about Babylon which give evidence, by inscribed bricks bearing his legend, of the marvellous activity and energy of this monarch. In the midst of all these gigantic undertakings, surrounded by a brilliant court of councillors and flatterers, the reason of the king was suddenly and mysteriously clouded. [Footnote: "Nebuchadnezzar fell a victim to that mental aberration which has often proved the penalty of despotism, but in the strange and degrading form to which physicians have given the name of lycanthropy; in which the patient, fancying himself a beast, rejects clothing and ordinary food, and even (as in this case) the shelter of a roof, ceases to use articulate speech, and sometimes persists in going on all-fours."--Smith's _Ancient History of the East_, p. 357.] After a period the cloud passed away, "the glory of his kingdom, his honor, and brightness returned unto him." But it was the splendor of the evening; for the old monarch soon after died at the age of eighty, worn out by the toils and cares of a reign of forty-three years, the longest, most memorable, and instructive in the annals of the Babylonian or Assyrian kings. THE FALL OF BABYLON.--In 555 B.C., Nabonadius, the last king of Babylon, began his reign. He seems to have associated with himself in the government his son Belshazzar, who shared with his father the duties and honors of royalty, apparently on terms of equal co-sovereignty. To the east of the valley of the Tigris and the Euphrates, beyond the ranges of the Zagros, there had been growing up an Aryan kingdom, the Medo-Persian, which, at the time now reached by us, had excited by its aggressive spirit the alarm of all the nations of Western Asia. For purposes of mutual defence, the king of Babylon, and Croesus, the well- known monarch of Lydia, a state of Asia Minor, formed an alliance against Cyrus, the strong and ambitious sovereign of the Medes and Persians. This league awakened the resentment of Cyrus, and, after punishing Croesus and depriving him of his kingdom (see p. 75), he collected his forces to chastise the Babylonian king. Anticipating the attack, Nabonadius had strengthened the defences of Babylon, and stationed around it supporting armies. But he was able to avert the fatal blow for only a few years. Risking a battle in the open field, his army was defeated, and the gates of the capital were thrown open to the Persians (538 B.C.). [Footnote: The device of turning the Euphrates, which Herodotus makes an incident of the siege, was not resorted to by Cyrus; but it seems that a little later (in 521-519 B.C.), the city, having revolted, was actually taken in this way by the Persian king Darius. Herodotus confused the two events.]