Johannizza, the king of Wallachia, who had besieged Adrianople, gave himself no rest, for his petraries, of which he had many, cast stones night and day against the walls and towers, and damaed the walls and towers very greatly. And he set his sappers to mine the walls, and made many assaults. And well did those who were within, both Greeks and Latins, maintain themselves, and often did they beg the Emperor Henry to succour them, and wam him that, if he did not succour them, they were utterly undone.