The killing of Uhtred by Thurbrand the Hold started a blood feud that lasted for many years and is the subject of the historical work, De obsessione Dunelmi. Uhtred's son Ealdred subsequently avenged his father by killing Thurbrand, but Ealdred in turn was killed by Thurbrand's son, Carl. Ealdred's vengeance had to wait until the 1070s, when Waltheof II, Ealdred's grandson had his soldiers kill most of Carl's sons and grandsons.