Historia ecclesiastica gentis Anglorum
His reign was not unopposed. The continuator of Bede's "Historia ecclesiastica gentis Anglorum" reports the death of a certain Oswine in 761. The "Anglo-Saxon Chronicle" and Symeon of Durham's "Historia Regum" supply more details, recording that Oswine, "a most noble ætheling", was killed fighting against Æthelwald on 6 August 761 in the Eildon Hills.