 In 737, Áed Allán met with Cathal at Terryglass, probably neutral ground outwith the control of either king.Byrne says that it is unlikely that Cathal acknowledged Áed Allán's authority—the Uí Néill had little enough influence in the south—but if Cathal had expected some benefit from the meeting, where he perhaps acknowledged the ecclesiastical supremacy of Armagh, he was to be disappointed.However, the clerics of Armagh may have been well satisfied as the Annals of Ulster, in the entry following that which reports the meeting of Cathal and Áed Allán, say that the law of Patrick was in force in Ireland.