In the year 616, the Persians broke into Egypt, took and plundered Alexandria, and carried their ravages to the borders of Æthiopia. Another Persian army besieged Chalcedon. Still Heraclius remained inactive. He only sent an embassy to Chosroes. In 619 he sent another, beseeching mercy in the name of the senate. Chosroes replied: “I will spare the Romans when they renounce their Crucified One and worship the sun”. He remembered not that he had to thank the Romans for his crown, that in his time of trouble he had found help only from the God of the Christians. Heraclius lost courage at this answer. Since the loss of Egypt Constantinople was suffering from famine, as well as a grievous pestilence. The emperor resolved to quit his capital, and take refuge with his father in Africa. He embarked his chief treasures, and directed the fleet to Carthage. Most of it was wrecked in a storm. A panic fell on his people, and they besought him with tears and cries not to forsake them. The patriarch Sergius went to the palace, led Heraclius to Sancta Sophia, and compelled him before the altar to swear aloud not to desert his capital. Heraclius submitted against his will. In 619 he was very nearly taken captive by the Khan of the Avars, who had asked him for an interview, ostensibly to settle terms of peace, in reality to secure his person and riches, and to fall upon Constantinople. The emperor came in great pomp, was surprised, and scarcely escaped in disguise. The Avars obtained an immense booty, and, according to the patriarch Nicephorus, carried away captive beyond the Danube 270,000 men, women, and children.