We read in the seanchus that there were forty kings on the throne of Munster from the time of Aonghus, son of Natfraoch, to Mathghamhain, son of Cinneide, and that during that time the Dal gCais possessed only Thomond (except Lorcan, who reigned a year and a half after Cormac son of Cuileannan, according to O Dubhagain, and died at the end of that time), namely, from Slighe Dhala which is called B