At this time the Western Isles, including the Isle of Man, were the subject of a constant struggle between the Danes and the Norwegians, for their acquisition by the former and their retention by the latter. The Danes of Limerick had, during the latter part of this century, acquired possession of the Isle of Man, and, as early as the year 973, we find Maccus, son of Aralt, who was at their head, called king of many islands;[632] but how far his sway over the Western Isles extended we do not know. Of the two pagan races who infested Ireland and the West of Scotland, the Danes were by far the more cruel and destructive in their attacks upon the monasteries, and appear to have been most dreaded. The last year of Mughron’s life had witnessed the arrival at Iona of one of the most powerful kings of the Danes of Dublin, Anlaf Cuaran, who in that year ‘went on a pilgrimage to Hi Coluimcille,’ where he died, ‘after penance and a good life;’[633] he was, however, closely connected with the Scottish royal family, having been son-in-law of King Constantin, and in close alliance with him, and had been baptized when king of the Northumbrians; but Mughron’s successor, Maelciarain ua Maigne, coärb of Columcille, ‘suffered red martyrdom from the Danes at _Athcliath_,’—that is, was slain by the Danes at Dublin in 986; and in the same year Iona is plundered by the Danes, on the eve of the nativity, and the abbot and fifteen of the clergy of the church were slain.[634] These were the Danes of Limerick, who were now under the rule of Gofraigh mac Aralt, the brother of Maccus, and who is termed by the Irish Annalists king of Innsigall, or the Western Isles. But he was encountered by Sigurd, earl of Orkney, and we find that in the following year a great slaughter was made of the Danes who had plundered Iona, and three hundred and sixty of them were slain; while two years later their king, Gofraigh, was himself killed in Dalriada, and the Isles once more passed into the undisturbed possession of the Norwegians, and were governed by the earls of Orkney.[635] The monastery which had been plundered was of course that stone monastery which had been built after the destruction of the wooden monastery by fire, and the small number of monks slain indicates that the greater part had taken refuge in the fort; but, like Blathmac, the abbot, whose name is not recorded, remained at his post, and tradition still points out a bay in the north end of the island, remarkable for its pure white sand, and called _Traith ban na manach_, or the White Bay of the Monks, as the scene where an abbot and fifteen monks were slain by the Danes. As this was the last time that Iona was plundered by the Danes, who not many years after were converted to Christianity, it is probably to this occasion that the tradition regarding the shrine of Saint Columba, given by Colgan on the authority of St. Berchan, may be referred. The story is