 He stayed in Ireland until 1213, during which time he had Carlow Castle erected and restructured his honour of Leinster.Taken back into favour in 1212, he was summoned in 1213 to return to the English court.Despite their differences, William remained loyal throughout the hostilities between John and his barons which culminated on 15 June 1215 at Runnymede with the sealing of Magna Carta.