1081, calls Malcolm the Second 'rex _Scotiae_,' and Brian, king of Ireland, 'rex _Hiberniae_.' The author of the 'Life of St. Cadroe,' in the eleventh century, likewise applies the name of _Scotia_ to North Britain."[5] A strong immigration early set in from the north of Ireland to the western parts of Scotland. It was under no leadership, but more in the nature of an overflow, or else partaking of the spirit of adventure. This was accelerated in the year 503, when a new colony of Dalriadic Scots, under the leadership of Fergus, son of Eric, left Ireland and settled on the western coast of Argyle and the adjacent isles. From Fergus was derived the line of Scoto-Irish kings, who finally, in 843, ascended the Pictish throne. The inhabitants of Ireland and the Highlands of Scotland were but branches of the same Keltic stock, and their language was substantially the same. There was not only more or less migrations between the two countries, but also, to a greater or less extent, an impinging between the people. Ulster, the northern province of Ireland, is composed of the counties of Antrim, Armagh, Cavan, Donegal, Down, Fermanagh, Londonderry, Monaghan and Tyrone. Formerly it was the seat of the O'Neills, as well as the lesser septs of O'Donnell, O'Cahan, O'Doherty, Maguire, MacMahon, etc. The settlements made by the earlier migrations of the Highlanders were chiefly on the coast of Antrim. These settlements were connected with and dependent on the Clandonald of Islay and Kintyre. The founder of this branch of that powerful family was John Mor, second son of "the good John of Islay," who, about the year 1400, married Majory Bisset, heiress of the Glens, in Antrim, and thus acquired a permanent footing. The family was not only strengthened by settling cadets of its own house as tenants in the territory of the Glens, but also by intermarriages with the families of O'Neill, O'Donnell, and others. In extending its Irish possessions the Clandonald was brought into frequent conflicts and feuds with the Irish of Ulster. In 1558 the Hebrideans had become so strong in Ulster that the archbishop of Armagh urged on the government the advisability of their expulsion by procuring their Irish neighbors, O'Donnell, O'Neill, O'Cahan, and others, to unite against them. In 1565 the MacDonalds suffered a severe defeat at the hands of Shane O'Neill, earl of Tyrone. The Scottish islanders still continued to exercise considerable power. Sorley Buy MacDonald, a man of great courage, soon extended his influence over the adjacent territories, in so much so that in 1575-1585, the English were forced to turn their attention to the progress of the Scots. The latter having been defeated, an agreement was made in which Sorley Buy was granted four districts. His eldest son, Sir James MacSorley Buy, or MacDonell of Dunluce, became a strenuous supporter of the government of James on his accession to the British throne.