was the taking of Babylon. This he accomplished in the reign of Belshazzar, one of the successors of Nebuchadnezzar, perhaps his son, by turning the Euphrates, which ran through the middle of the city, out of its course; and when its bed was dry he entered the city by this road and captured it with little resistance. Cyrus was now the sole master of the vast Assyrian Kingdom, once more in his hands brought back to something like the unity it had before the great Median revolt. But he was not content, nor was it perhaps possible for him to rest in the enjoyment of power and possessions extorted by force, and dependent on force to hold. The new empire, like the old one, was destined to break in pieces by its own weight. Cyrus was kept in constant activity by the necessity of resisting the inroads on his empire of the tribes in the north and farther east; and it was in endeavoring to repel invasion and to maintain order in the regions he had already conquered, that he met his death. After a reign of thirty years he was slain, in 529 B.C., in battle with the Massagetae, a tribe of Central Asia. He left his kingdom to his son Cambyses. [Signature of the author.] ALEXANDER THE GREAT (356-323 B.C.) [Illustration: Alexander.] Alexander the Great, son of Philip of Macedon and Olympias, daughter of Neoptolemus of Epirus, was born at Pella, 356 B.C. His mind was formed chiefly by Aristotle, who instructed him in every branch of human learning, especially in the art of government. Alexander was sixteen years of age when his father marched against Byzantium, and left the government in his hands during his absence. Two years afterward, he displayed singular courage at the battle of Chaeronea (338 B.C.), where he overthrew the Sacred Band of the Thebans. "My son," said Philip, as he embraced him after the conflict, "seek for thyself another kingdom, for that which I leave is too small for thee." The father and son quarrelled, however, when the former divorced Olympias. Alexander took part with his mother, and fled to Epirus, to escape his father's vengeance; but receiving his pardon soon afterward, he returned, and accompanied him in an expedition against the Triballi, when he saved his life on the field. Philip, being appointed generalissimo of the Greeks, was preparing for a war with Persia, when he was assassinated (336 B.C.), and Alexander, not yet twenty years of age, ascended the throne.