toirdhealbhach o brían on the other hand was pre-occupied with extending his influence into leinster (the kingdom whose rejection of tributes had led to his ancestor, brian boru's, death in 1014), as well as with putting down rebellion in his native thomond and with ensuring his vassals of munster, the maccarthys, knew their place. both kings had in fact ratified a treaty at terryglass monastery in 1144, possibly to recognise and respect their spheres of influence.