The relations of the Irish with other nations, notwithstanding the injurious effects of their War of Succession on national unity and reputation, present several points of interest. After the defeat of Magnus Barefoot, we may drop the Baltic countries out of the map of the relations of Ireland. Commencing, therefore, at the north of the neighbouring island—which, in its entirety, they sometimes called _Inismore_—the most intimate and friendly intercourse was always upheld with the kingdom of Scotland. Bound together by early ecclesiastical and bardic ties, confronting together for so many generations a common enemy, those two countries were destined never to know an international quarrel. About the middle of the ninth century (A.D. 843), when the Scoto-Irish in Caledonia had completely subdued the Picts and other ancient tribes, the first national dynasty was founded by Kenneth McAlpine. The constitution given by this Prince to the whole country seems to have been a close copy of the Irish—it embraced the laws of Tanistry and succession, and the whole Brehon code, as administered in the parent state. The line of Kenneth may be said to close with Donald Bane, brother of Malcolm III., who died in 1094, and not only his dynasty but his system ended with that century. Edgar, Alexander I., and David I., all sons of Malcolm III., were educated in England among the victorious Normans, and in the first third of the twelfth century, devoted themselves with the inauspicious aid of Norman allies, to the introduction of Saxon settlers and the feudal system, first into the lowlands, and subsequently into Moray-shire. This innovation on their ancient system, and confiscation of their lands, was stoutly resisted by the Scottish Gael. In Somerled, lord of the Isles, and ancestor of the Macdonalds, they found a powerful leader, and Somerled found Irish allies always ready to assist him, in a cause which appealed to all their national prejudices. In the year 1134, he led a strong force of Irish and Islesmen to the assistance of the Gaelic insurgents, but was defeated and slain, near Renfrew, by the royal troops, under the command of the Steward of Scotland. During the reigns of William the Lion, Alexander II., and Alexander III., the war of systems raged with all its fierceness, and in nearly all the great encounters Irish auxiliaries, as was to be expected, were found on the side of the Gaelic race and Gaelic rights. Nor did this contest ever wholly cease in Scotland, until the last hopes of the Stuart line were extinguished on the fatal field of Culloden, where Irish captains formed the battle, and Irish blood flowed freely, intermingled with the kindred blood of Highlanders and Islesmen.