Complex sentence: Of William's other sons, Bishop Wimund had already been blinded, emasculated and imprisoned at Byland Abbey before David's death, but Domnall mac Uilleim, first of the Meic Uilleim, had considerable support in the former mormaerdom of Moray.
Split into simpler sentences: Of William's other sons, Bishop Wimund had already been blinded, emasculated and imprisoned at Byland Abbey before David's death. However, Domnall mac Uilleim, first of the Meic Uilleim, had considerable support in the former mormaerdom of Moray.