The death of David I, in 1153, was immediately followed by Celtic revolts against Anglo-Norman order. The province of Moray made a final effort on behalf of Donald Mac Malcolm MacHeth, the son of the Malcolm MacHeth of the previous reign, and of a sister of Somerled of Argyll, the ancestor of the Lord of the Isles. The new king, Malcolm IV, the grandson of David, easily subdued this rising, and it is in connection with its suppression that Fordun makes the statement, quoted in the Introduction, about the displacement of the population of Moray. There is no earlier authority for it than the fourteenth century, and the inherent probability in its favour is so very slight that but little weight can reasonably be assigned to it. David had already granted Moray to Anglo-Normans who were now in possession of the Lowland portion and who ruled the Celtic population. We should expect to hear something definite of any further change in the Lowlands, and a repopulation of the Highlands of Moray was beyond the limits of possibility. The king, too, had little time to carry out such a measure, for he had immediately to face a new rebellion in Galloway; he reigned for twelve years in all, and was only twenty-four years of age when he died. The only truth in Fordun's statement is probably that Malcolm IV carried on the policy of David I in regard to the land-owners of Moray, and forfeited the possessions of those who had taken part in MacHeth's rising. In Galloway, a similar policy was pursued. Some of the old nobility, offended perhaps by Malcolm's attendance on Henry II at Toulouse, in his capacity as an English baron, joined the defeated Donald MacHeth in an attempt upon Malcolm, at Perth, in 1160. MacHeth took refuge in Galloway, which the king had to invade three times before bringing it into subjection. Before his death, in 1165, Galloway was part of the feudal kingdom of Scotland.