Translation according to P. W. Joyce:
Cartrontrellick in Galway; Cartron-tri-liag, the quarter-land of the three pillar-stones. See Duntry-league in vol. i. p. 262 [reproduced below].
We learn the origin of Duntryleague near Galbally in Limerick, from a passage in the Book of Lismore, which states that "Cormac Cas (king of Munster), son of Oilioll Olum (see p. 134, supra) fought the battle of Knocksouna (near Kilmallock) against Eochy Abhradhruadh [Ohy-Avraroo], king of Ulster, in which Eochy was slain; and Cormac was wounded (in the head), so that he was three years under cure, with his brain continually flowing from his head." Then a goodly dún was constructed for him, "having in the middle a beautiful clear spring, and a great royal house was built over the well, and three liagáns (pillar stones) were placed round it, on which was laid the bed of the king, so that his head was in the middle between the three pillars. And one of his attendants stood constantly by him with a cup, pouring the water of the well on his head. He died there after that, and was buried in a cave within the dun; and from this is (derived) the name of the place, Dun-tri-liag, the fortress of the three pillar stones". The erection of three stones like those at Duntryleague must have been usual, for we find several names containing the compound tri-liag, three pillar stones. It occurs simply in the form of Trillick, as the name of a village in Tyrone, and of two townlands, one in Donegal and the other in Fermanagh. In the parish of Ballymacromick, Longford, there are two townlands called respectively, Trillickacurry and Trillickatemple, the trillick or three stones of the marsh, and of the church. Near Dromore in Down, we find Edentrillick, and in the parish of Tynan, Armagh, Rathtrillick, the first the hill brow, and the second the fort, of the three pillar stones.