 Although Ua Conchobair appears to have allowed Mac Murchada to retain his patrimonial lordship of Uí Chennselaig, the "Annals of the Four Masters" reveals that the Leinstermen and Dubliners assisted Tigernán Ua Ruairc, King of Bréifne in forcing Mac Murchada from this final vestige of authority and into exile.The following year, Ua Conchobair convened a great assembly at Athboy.The "Annals of the Four Masters" states that 13,000 horsemen attended the meeting—1,000 of which were supplied from Dublin.