Játvarðar Saga relates that when the Anglo-Saxon & Anglo-Danish rebels, fighting against William the Conqueror, became sure that the Danish king Sveinn Ástríðarson would not help them any more, they agreed to leave England for Constantinople (Miklagarðr).[5] The English force consisted of 350 ships, a "great host" and "three earls and eight barons", all led by one "Siward earl of Gloucester" (Sigurðr jarl af Glocestr).