About this time Somerled, the ambitious and powerful lord of the Isles, made another and a last attempt upon the king’s authority, Having collected a large force, chiefly in Ireland, he landed, in 1164, near Renfrew; but he was defeated by the brave inhabitants and the king’s troops in a decisive battle, in which he and his son Gillecolum were slain. The reign of William the Lion, who succeeded his brother in 1165, was marked by many disturbances in the Highlands. The Gaelic population could not endure the new settlers whom the Saxon colonization had introduced among them, and every opportunity was taken to vex and annoy them. An open insurrection broke out in Ross-shire, headed by Donald Bane, known also as MacWilliam, which obliged William, in the year 1181, to march into the north, where he built the two castles of Eddirton and Dunscath to keep the people in check. He restored quiet for a few years; but, in 1187, Donald Bane again renewed his pretensions to the crown, and raised the standard of revolt in the north. He took possession of Ross, and wasted Moray. William lost no time in leading an army against him. While the king lay at Inverness with his army, a party of 3,000 faithful men, under the command of Roland, the brave lord of Galloway, and future Constable of Scotland, fell in with Donald Bane and his army upon the Mamgarvy moor, on the borders of Moray. A conflict ensued in which Donald and five hundred of his followers were killed. Roland carried the head of Donald to William, “as a savage sign of returning quiet.” After this comparative quietness prevailed in the north till the year 1196, when Harold, the powerful Earl of Orkney and Caithness, disturbed its peace. William dispersed the insurgents at once; but they again appeared the following year near Inverness, under the command of Torphin, the son of Harold. The rebels were again overpowered. The king seized Harold, and obliged him to deliver up his son, Torphin, as an hostage. Harold was allowed to retain the northern part of Caithness, but the king gave the southern part of it, called Sutherland, to Hugh Freskin, the progenitor of the Earls of Sutherland. Harold died in 1206; but as he had often rebelled, his son suffered a cruel and lingering death in the castle of Roxburgh, where he had been confined.