The borders of Tyrconnell and Tyrone, like every other tribe-land, were frequently enlarged or contracted, according to the vigour or weakness of their chiefs or neighbours. In the age of which we now speak, Tyrconnell extended from the Erne to the Foyle, and Tyrone from the Foyle to Lough Neagh, with the exception of the extreme north of Berry and Antrim, which belonged to the O'Kanes. It was not till the fourteenth century that the O'Neils spread their power east of Lough Neagh, over those baronies of Antrim long known as north and south _Clan-Hugh-Buidhe_, (Clandeboy.) North Antrim was still known as Dalriada, and South Antrim and Down, as Ulidia. Oriel, which has been usually spoken of in this history as Louth, included angles of Monaghan and Armagh, and was anciently the most extensive lordship in Ulster. The chieftain families of Tyrconnell were the O'Donnells; of Tyrone, the O'Neils and McLaughlins; of Dalriada, O'Kanes, O'Haras, and O'Shields; of Ulidia, the Magennis of Iveagh and the Donlevys of Down; of Oriel, the McMahons and O'Hanlons. Among these populous tribes the invaders dealt some of their fiercest blows, both by land and sea, in the thirteenth century. But the north was fortunate in its chiefs; they may fairly contest the laurel with the O'Conors, O'Briens and McCarthys of the west and south. In the first third of the century, Hugh O'Neil, who succeeded to the lordship of Tyrone in 1198, and died in 1230, was cotemporary with Donnell More O'Donnell, who, succeeding to the lordship of Tyrconnell in 1208, died in 1241, after an equally long and almost equally distinguished career. Melaghlin O'Donnell succeeded Donnell More from '41 to '47, Godfrey from '48 to '57, and Donnell Oge from 1257 to 1281, when he was slain in battle. Hugh O'Neil was succeeded in Tyrone by Donnell McLaughlin, of the rival branch of the same stock, who in 1241 was subdued by O'Donnell, and the ascendancy of the family of O'Neil established in the person of Brian, afterwards chosen King of Ireland, and slain at Down. Hugh Boy, or the Swarthy, was elected O'Neil on Brian's death, and ruled till the year 1283, when he was slain in battle, as was his next successor, Brian, in the year 1295. These names and dates are worthy to be borne in mind, because on these two great houses mainly devolved the brunt of battle in their own province.