By these implacable enemies, Heraclius, on either side, was insulted and besieged: and the Roman Empire was reduced to the walls of Constantinople, with the remnant of Greece, Italy, and Africa, and some maritime cities, from Tyre to Trebizond, of the Asiatic coast. After the loss of Egypt, the capital was afflicted with famine and pestilence; and the emperor, incapable of resistance and hopeless of relief, had resolved to transfer his person and government to the more secure residence of Carthage. His ships were already laden with the treasures of the palace; but his flight was arrested by the patriarch, who armed the powers of religion in the defence of his country, led Heraclius to the altar of St. Sophia, and extorted a solemn oath, that he would live and die with the people whom God had entrusted to his care. The chagan was encamped in the plains of Thrace; but he dissembled his perfidious designs, and solicited an interview with the emperor near the town of Heraclea. Their reconciliation was celebrated with equestrian games; the senate and people in their gayest apparel resorted to the festival of peace; and the Avars beheld, with envy and desire, the spectacle of Roman luxury. On a sudden the Hippodrome was encompassed by the Scythian cavalry, who had pressed their secret and nocturnal march: the tremendous sound of the chagan’s whip gave the signal of the assault; and Heraclius, wrapping his diadem round his arm, was saved with extreme hazard by the fleetness of his horse. So rapid was the pursuit, that the Avars almost entered the golden gate of Constantinople with the flying crowds; but the plunder of the suburbs rewarded their treason, and they transported beyond the Danube 270,000 captives. On the shore of Chalcedon, the emperor held a safer conference with a more honourable foe, who, before Heraclius descended from his galley, saluted with reverence and pity the majesty of the purple.