On the death of Donald, by the singular law of alternate succession which was in force amongst the Gaelic people, the son and representative of Aodh was raised to the throne as Constantine the Second; and, with better fortune than his father, the earlier years of his reign were signalized by a brilliant victory. A body of the Northmen, who appear, as usual, to have landed from Ireland or the Western Isles, [Sidenote: A. D. 903.] and to have chosen Fortreim as the scene of their ravages, were defeated in Strathearn with great slaughter, and with the loss of their leader Ivar hy Ivar, [Sidenote: A. D. 904.] a grandson of the famous Northman of the same name, whose family had been recently expelled from their Irish possessions.[59] Released by his victory from all fear of further invasion, Constantine seems to have turned his attention towards regulating the affairs of the Church, for his next appearance is upon the Moot-hill of Scone, a well-known eminence in the neighbourhood of the new capital, where, in conjunction with Fothadh, the bishop of St. Andrews, he presided at the earliest ecclesiastical council recorded in the annals of Scotland.[60] A far more important object, however, in its ulterior consequences, was accomplished shortly afterwards by a bloodless revolution, which enabled him to take the first steps towards enlarging his kingdom on her southern frontiers, and to place a member of his own family upon the throne of an adjacent principality. An occasional brief entry in the early chronicles reveals the anxiety of the rulers of the Picts and Scots to avail themselves of the gradual decline of the Northumbrian power for the purpose of extending their own influence over the neighbouring province of Strath Clyde. Some such motives may have instigated Kenneth to seek for his daughter the alliance of a British prince; and a few years later, the death of Artga, king of Strath Clyde, which is attributed by the Irish annalists to the intrigues of Constantine the First,[61] [Sidenote: A. D. 871.] may have been connected with the same policy of aggrandizement, and have furthered the claims of Eocha, the son of Constantine’s sister. The advancement of Eocha to the [Sidenote: A. D. 878.] Scottish throne was shortly followed by important consequences to his native province, and after the flight and death of the Welsh prince Rydderch ap Mervyn had deprived the northern Britons of one of their firmest supporters, a considerable body of the men of Strath Clyde, relinquishing the ancient country of their forefathers, set out, under a leader of the name of Constantine, to seek another home amongst a kindred people in the south. Constantine fell at Lochmaben in attempting to force a passage through Galloway; but his followers, undismayed at their loss, persevered in their enterprise, arriving in time to assist the Northern Welsh at the great battle of the Conway, where they won the lands, [Sidenote: A. D.