The reign of Alexander I. was disturbed, about the year 1116, by an attempt made by the men of Moray and Merne to surprise the king while enjoying himself at his favourite residence at Invergowrie, on the north bank of the Tay, not far from its mouth. The king, however, showed himself more than a match for his enemies, as he not only defeated their immediate purpose, but, pursuing them with his army across the Moray Frith, chastised them so effectually as to keep them quiet for the remainder of his reign, which ended by his death, in April, 1124. In 1130, six years after the accession of King David I. to the Scottish throne, while he was in England, the Moraymen again rose against the semi-Saxon king, but were defeated at Strickathrow, in Forfarshire, by Edward the Constable, son of Siward Beorn, Angus the Earl of Moray being left among the dead, Malcolm his brother escaping to carry on the conflict. In 1134 David himself took the field against these Highlanders, and, with the assistance of the barons of Northumberland, headed by Walter L’Espec, completely subdued the Moraymen, confiscated the whole district, and bestowed it upon knights in whose fidelity he could place confidence, some of these being Normans. This was manifestly, according to Dr. Maclauchlan, the period of the dispersion of the ancient Moravienses. Never till then was the power of the Moray chiefs thoroughly broken, and only then were the inhabitants proscribed, and many of them expelled. The Murrays, afterwards so powerful, found their way to the south, carrying with them the name of their ancient country, and some of the present tribes of Sutherland, as well as of Inverness-shire, who, there is reason to believe, belonged to the Scoto-Pictish inhabitants of Moray, removed their dwellings to those portions of the country which they have occupied ever since. The race of Mac Heth may appear among the Mac Heths or Mac Aoidhs, _the Mackays_ of Sutherland, nor is this rendered less probable by the Morganaich or _sons of Morgan_, the ancient name of the Mackays, appearing in the Book of Deer as owning possessions and power in Buchan in the 10th or 11th century.[121]