Then Achilles went forth to battle inspired with a rage and thirst for vengeance that made him irresistible. The bravest warriors fled before him or fell by his lance. Hector, cautioned by Apollo, kept aloof; but the god, assuming the form of one of Priam’s sons, Lycaon, urged Æneas to encounter the terrible warrior. Æneas, though he felt himself unequal, did not decline the combat. He hurled his spear with all his force against the shield the work of Vulcan. It was formed of five metal plates; two were of brass, two of tin, and one of gold. The spear pierced two thicknesses, but was stopped in the third. Achilles threw his with better success. It pierced through the shield of Æneas, but glanced near his shoulder and made no wound. Then Æneas seized a stone, such as two men of modern times could hardly lift, and was about to throw it, and Achilles, with sword drawn, was about to rush upon him, when Neptune, who looked out upon the contest, moved with pity for Æneas, who he saw would surely fall a victim if not speedily rescued, spread a cloud between the combatants, and lifting Æneas from the ground, bore him over the heads of warriors and steeds to the rear of the battle. Achilles, when the mist cleared away, looked round in vain for his adversary, and acknowledging the prodigy, turned his arms against other champions. But none dared stand before him, and Priam looking down from the city walls beheld his whole army in full flight towards the city. He gave command to open wide the gates to receive the fugitives, and to shut them as soon as the Trojans should have passed, lest the enemy should enter likewise. But Achilles was so close in pursuit that that would have been impossible if Apollo had not, in the form of Agenor, Priam’s son, encountered Achilles for a while, then turned to fly, and taken the way apart from the city. Achilles pursued and had chased his supposed victim far from the walls, when Apollo disclosed himself, and Achilles, perceiving how he had been deluded, gave up the chase.