The marriage of the Lord of the Isles, the head of this race, with a daughter of the great Irish house of O’Cathan, princes of an extensive territory in the north of Ireland, towards the close of the thirteenth century, still further cemented the connexion with Ireland. Tradition records that twenty-four families followed this lady from Ulster to the Scottish Highlands, and founded as many houses there, and, in the subsequent century, a scion of the House of the Isles acquired land in the north of Ireland, and founded the Antrim family. In all the Irish wars this race took generally a part, and, in their own wars at home, were rarely without assistance from Ireland.

The struggle between this great Celtic family and the Crown assumed an aspect at length which could only terminate in the ruin of the former or the humiliation of the latter, and at length resulted in the forfeiture of the Lord of the Isles in 1478, and his subsequent submission, when he resigned his hereditary Celtic title, and received in exchange the feudal dignity of Lord of the Isles; a humiliation which gave deep offence to his subjects, and was not acquiesced in by them, and produced such internal dissensions, that the Crown took advantage of them to enforce the final forfeiture of the Lordship of the Isles in the year 1493. A series of insurrections followed in favour of the descendants of the forfeited Lord, which finally terminated in the utter extinction of the kingdom of the Isles in the year 1545.

During this period, which extends to nearly four centuries, there was not only a close political connexion between the Western Highlands and Islands and Ireland, but the literary influence was equally close and strong; the Irish sennachies and bards were heads of a school which included the West Highlands, and the Highland sennachies were either of Irish descent, or, if of native origin, resorted to bardic schools in Ireland for instruction in the language and the accomplishments of their art.

The annals of the four masters record the following Irish sennachies as being recognised masters in the Highlands:—

In 1185 died Maclosa O’Daly, ollav, or chief sage or poet of Erin and Alban; a man illustrious for his poetry, hospitality, and nobility.

In 1328 died the blind O’Carril, chief minstrel of Erin and Alban in his time.

In 1448 died Tadg og, son of Tadg, son of Giollacoluim O’Higgin, chief preceptor of the poets of Erin and Alban.

In 1554 died Tadg, son of Aodh O’Coffey, chief teacher of poetry in Erin and Alban.

The oldest of the Gaelic MSS., preserved in the Library of the Faculty of Advocates, belong to this period. They are all written in the Irish character; the language is the written language of Ireland; and they contain numerous specimens of the poetry of these Irish masters, especially of Tadg og and the O’Dalys.

The Betons, or, as their name was in Gaelic, Macbheatha, who were hereditary physicians in Isla and Mull, and who were also sennachies of the Macleans, were of Irish descent, being O’Neills, and are said by tradition to be one of the families who accompanied O’Cathan’s daughter to Scotland; and many of these MSS. belonged to them. The M’Vurichs, who were hereditary sennachies to Clanranald, were likewise of Irish descent, and are said “to have received their education in Irish Colleges of poetry and writing.”[24] Many of these MSS. were compiled by them; and the earliest are likewise written in the Irish character and idiom. The sennachies of the other great families, comprised within the dominions of the Lords of the Isles, appear likewise to have all resorted to Ireland for instruction and training in their art.