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The History and Topography of the County of Clare by James Frost

Part II. History of Thomond
Chapter 12. History of Thomond before it was formed into an English county: From the earliest times, to the death of De Clare, and expulsion of the English in 1318.

Authentic History of Thomond begins about the year A.D. 954; The O’Briens—Lachtna, uncle of Brian Boroimhe; Mahone, another uncle, succeeds to the sovereignty of South as well as of North Munster

With these scanty references we must pass on to the period immediately preceding the times of Brian Boroimhe, when the history of Thomond really begins. The story of the O’Briens forms the central point, and around it the history of the whole people of Thomond generally groups itself. They were always the chiefs, and their vicissitudes, whether they were prosperous or unfortunate, ever swayed the destinies of their kindred and followers, the inhabitants of Clare. As is well known, that great family was descended from the hereditary kings of the southern half of Ireland, who had their royal residence at Cashel. Lachtna, the uncle of Brian Boroimhe, was king of North Munster; he established his home at Cragliath, in the neighbourhood of Killaloe, and there, about the year 953, built his royal palace, called after him Grianán Lachtna. His reign was only for three years, and he was succeeded by his nephew, Mahone, in 954. By the death of the king of Cashel, Mahone united in himself the sovereignity of the southern as well as the northern part of Munster, and reigned over these for a period of sixteen years. He fought various battles against the Connaughtmen, and others of his foes, but the chief objects of his hostilities were the Danes. Against these he waged perpetual war. He beat them in 968, at Salchoid, now Salloghed, near the Limerick Railway Junction, and slew 3,000 of their number, with Manus of Limerick, their commander. Again, in 970, he was equally successful against Iver of Limerick, another of their leaders. He fought and vanquished the united forces of the Danes of Cork, Waterford, and Limerick in the year 975. After a successful reign, distinguished by his patriotic efforts to rid his country of its foreign invaders, Mahone came to an untimely end by the treachery of the chief of the O’Mahonys.