Edgar ruled as a strong and popular king for 16 years. In 975 he was succeeded by his eldest son Edward "the Martyr". His accession was disputed by his stepmother, Ælfthryth, who wished her own son Æthelred to reign. Through the influence of Dunstan, Edward was chosen and crowned at Winchester. Edgar's death had encouraged the reactionary nobles, and at once there was a determined attack upon the monks, the protagonists of reform. Throughout Mercia they were persecuted and deprived of their possessions. Their cause, however, was supported by Æthelwine, the ealdorman of East Anglia, and the realm was in serious danger of civil war. Three meetings of the Witan were held to settle these disputes, at Kyrtlington, at Calne, and at Amesbury. At the second of them the floor of the hall where the Witan was sitting gave way, and all except Dunstan, who clung to a beam, fell into the room below; several men were killed.