The Marquis of Montferrat besieged Napoli, but he could there do nothing, for the place was too strong, and his men suffered greatly. James of Avesnes, meanwhile, continued to besiege Corinth, where he had been left by the marquis. Leon Sgure, who was in Corinth, and very wise and wily, saw that James had not many people with him, and did not keep good watch. So one morning, at the break of day, he issued from the city in force, and got as far as the tents, and killed many before they could get to their armour. . There was killed Dreux of Estruen, who was very honourable and valiant, and greatly was he lamented. And James of Avesnes, who was in command, waxed very wroth at the death of his knight, and did not leave the fray till he was wounded in the leg right grievously. And well did those who were present bear witness that it was to his doughtiness that they owed their safety; for you must know that they came very near to being all lost. But by God's help they drove the Greeks back into the castle by force.

Now the Greeks, who were very disloyal, still nourished treachery in their hearts. They perceived at that time that the Franks were so scattered over the land that each had his own matters to attend to. So they thought they could the more easily betray them. They took envoys therefore privily, from all the cities in the land, and sent them to Johannizza, the King of Wallachia and Bulgaria, who was still at war with them as he had been aforetime. And they told Johannizza they would make him emperor, and give themselves wholly to him, and slay all the Franks. So they swore that they would obey him as their lord, and he swore that he would defend them as though they were his own people. Such was the oath sworn.