And the words of this chant are still resounding. But Alexander, angry and inexorable, refuses to relent. He levels the towers which had first risen to the music of Amphion, and delivers the city to the flames: thus adding a new act to that tragic history which made Dante select Thebes as the synonyme of misfortune.[56] Turning from these smoking ruins, he gathers men and ships for his expedition against Persia. Traversing the sea, he lands in Asia; and here the poet describes geographically the different states of this continent,--Assyria, Media, Persia, Arabia, with its Sabaean frankincense and its single Phoenix, ending with Palestine and Jerusalem, where a God was born of a Virgin, at whose death the world shook with fear. Commencing his march through Cilicia and Phrygia, the ambitious youth stops at Troy, and visits the tomb of Achilles, where he makes a long speech. The second book opens with the impression produced on the mind of Darius, menaced by his Macedonian enemy. He writes an insolent letter, which Alexander answers simply by advancing. At Sardes he cuts the Gordian knot, and then advances rapidly. Darius quits the Euphrates with his vast army, which is described. Alexander bathes in the cold waters of the Cydnus, is seized with illness, and shows his generous trust in the physician that attended him,--drinking the cup handed him, although it was said to be poisoned. Restored to health, he shows himself to his troops, who are transported with joy. Meanwhile the Persians advance. Darius harangues his soldiers. Alexander harangues his. The two armies prepare for battle. The third book is of battle and victory at Issus, described with minuteness and warmth. Here is the death of Zoroas, the Egyptian astronomer, than whom nobody was more skilled in the stars, the origin of winter's cold or summer's heat, or in the mystery of squaring the circle,--_circulus an possit quadrari_.[57] The Persians are overcome. Darius seeks shelter in Babylon. His treasures are the prey of the conqueror. Horses are laden with spoils, and the sacks are so full that they cannot be tied. Rich ornaments are torn from the women, who are surrendered to the brutality of the soldiers. The royal family alone is spared. Conducted to the presence of Alexander, they are received with the regard due to their sex and misfortune. The siege and destruction of Tyre follow; then the expedition to Egypt and the temple of Jupiter Ammon. Here is a description of the desert, which is said, like the sea, to have its perils, with its Scylla and its Charybdis of sand:-- "Hic altera sicco Scylla mari latrat; hic pulverulenta Charybdis."[58] Meanwhile Darius assembles new forces. Alexander leaves Egypt and rushes to meet him. There is an eclipse of the moon, which causes a sedition among his soldiers, who dare to accuse their king. The phenomenon is explained by the soothsayers, and the sedition is appeased.