Accounts of Eadric's act of rebellion in Herefordshire in 1067 are included in Manuscript D the
Anglo-Saxon Chronicle,
John of Worcester's
Chronicle and
Orderic Vitalis. After the Conquest of England by
William II of Normandy, Eadric refused to submit and therefore came under attack from
Norman forces based at
Hereford Castle, under
Richard fitz Scrob. He raised a rebellion and, allying himself with the Welsh prince of
Gwynedd and
Powys,
Bleddyn ap Cynfyn, and his brother
Rhiwallon ap Cynfyn, he unsuccessfully attacked the Norman
Hereford Castle in 1067. They did not take the county, and retreated to Wales to plan further raiding. During the widespread wave of English rebellions in 1069–70, he burned the town of
Shrewsbury and unsuccessfully besieged
Shrewsbury Castle, again helped by his Welsh allies from Gwynedd, as well as other English rebels from
Cheshire. It was probably this combination of forces which was decisively defeated by William in a battle at
Stafford in late 1069. Eadric apparently submitted to King William in 1070 and later participated in William's invasion of Scotland in 1072. Another account states that he was captured by
Ranulph de Mortimer "after long struggles and handed over to the king for life imprisonment, some of his lands afterwards descending to the abbey" of
Wigmore. He campaigned in
Maine for King William in 1072 and according to the Mortimer genealogy held
Wigmore Castle against
Ranulph de Mortimer during the rebellion of 1075. ==Post-rebellion==