The Scots opposed a successful resistance to William the Conqueror and his successors, whenever they attempted a conquest. To the Conqueror they were especially obnoxious, for Maol Choluim Ceannmhór ('Malcolm Canmore') took under his protection the refugee royal family of England, the Athelings. In 1067, Malcolm married a princess of this line, Margaret, grand-daughter of the Saxon king Edmund—St. Margaret of Scotland, for she was canonised after her death. This queen exercised great influence over her husband, and brought about a partial feudalisation of the Gaelic system in Scotland. From her time onward, the small Anglian population not merely acquired a favourable status but gradually took on the appearance of being the most considerable element in the kingdom. Various causes contributed to this end. The Northumbrian dialect of English, now chiefly represented by the Lowland Scotch dialect, became the most convenient medium of intercourse not only with England but also with the Norsemen and the people of the Low Countries. To this day Lowland Scotch bears a close resemblance to Dutch and Flemish, and we have it on the ancient testimony of the Norsemen themselves that they were able to hold speech with the Angles, each people using their own language. In consequence, the Anglian dialect of Scotland spread westward across the Lowlands and northward along the coast of the North Sea. There is, however, one little fact which shows us how effectively Margaret's influence operated against the Gaelic tradition of the Scottish court and its outlook. Before her time, the kings of the Dál Riada line bore Irish names. Only two names that are not Irish are found in their list—Constantine and Gregory, the names of a celebrated Emperor and a celebrated Pope. The names of the six sons of Malcolm and Margaret were: Edward, Edmund, Edgar, Ethelred, Alexander, and David; of their two daughters, Maud and Mary—not one of them Gaelic; and with the exception of Malcolm's immediate successor, Domhnall, and another Malcolm, no king of the Scots after his time bore a Gaelic name.

Malcolm's kingdom, though it did not extend over the Norse settlements in the north and west of Scotland, included a territory roughly corresponding to Cumberland and Northumberland in the north of England.

A frequent effect of the feudal law of succession by primogeniture was the breach of succession owing to the failure of heirs in the male line. Under the Irish (and also Welsh) law of succession, by election from a family group, this difficulty was avoided. After Malcolm's death in 1093, his brother, Domhnall Bán, secured the kingship and, we are told, expelled all the foreigners who had come to Scotland under the protection of Malcolm and Margaret. In effect, the reign of Domhnall represents a brief Gaelic reaction against the new-come feudalism. In 1097, Domhnall was overthrown by Malcolm's eldest surviving son Edgar, with the assistance of the English, and thenceforward the feudal system took hold and the Irish kingdom may be said to have come to an end. Nevertheless, the Irish tradition was not wholly abandoned. The last of the Dalriadic kings was Alexander III who reigned from 1249 until 1285. In his reign, all the Norse possessions formerly subject to the suzerainty of the kings of Norway, comprising the Orkney and Shetland islands, Caithness, the Hebrides and Argyleshire, became subject to the kingdom of Scotland. The failure of the direct line, upon Alexander's death without male heir, brought about the wars of the Scottish succession, terminated by the battle of Bannockburn in 1314. An interesting account has been preserved of the coronation ceremony as exemplified at the accession of this last king of the direct Irish line in Scotland, Alexander III. "The ceremony was performed by the bishop of St. Andrews, who girded the king with a military belt. He then explained in Latin, and afterwards in Gaelic, the laws and oaths relating to the king.... After the ceremony was performed, a Highlander"—we may understand that he was the official seanchaidh—"repeated on his knees before the throne, in his own language, the genealogy of Alexander and his ancestors, up to the first king of Scotland." Gaelic, therefore, continued to be the language of the Scottish court, of king, bishop, and courtier, until 1285, when the direct line of Fergus son of Erc became extinct.

Having endeavoured to trace the principal phases in the history of an Irish kingdom which, established in Argyle and the western islands of Scotland, became gradually more and more alienated from the mother country, let us now glance through the history of another kingdom, a foreign kingdom established in the same forelands and islands, a realm which became gaelicised as the Scots kingdom became feudalised and anglicised, and which drew closer and closer to Ireland, so as to bring a decisive element into the affairs of this nation during a critical period in its history.

I have already shown how, while the Scots were becoming masters of the mainland in northern Britain, the Norsemen took possession of the old Dalriadic territory of Argyle and the islands. On the mainland, the Norsemen also occupied Cunningham in Ayrshire, Galloway to the north of the Solway Firth, and Caithness in the far north. In the Gaelic of Scotland, both Galloway and Caithness are named Gallaibh, i.e. the Foreigners' territory, and the Irish name of the Hebrides after they passed into Norse hands is Innse Gall, "the Foreigners' islands."

We have no records to show the precise date at which these colonies were established, but in view of the Norse supremacy on the seas from the close of the eighth century, their establishment is not likely to have been later than the foundation of the first Norse colony on the Irish mainland, namely, the colony of Dublin, in 841. The year after this, 842, Cinaedh, the future conqueror of the Picts and Britons and Angles, became king of the Scots.

The first clearly defined authority found among these Norse settlements is that of the Orkney earls, dating from before 880. Before that time, a mixed Norse and Gaelic population, called Gall-Ghaedhil, is seen taking part in the Norse wars in Ireland, some on the Norse and some on the Irish side, as may be seen from the annals of the years 856 and 857. These people doubtless came from Scotland, perhaps also from the Isle of Man, also occupied by the Norsemen. Their language was broken Irish, as may be judged from the words of an Irish tract which, in praising the accurate utterance of a speaker, says "it is not the giog-gog of a Gall-Ghaedheal." But they must also have used the Norse language.

About the year 880, Harold the Fair, king of Norway, came over and established the supremacy of Norway over the settlements in the Orkneys, the Hebrides, Argyle and the Isle of Man.

A century later, in 980, we find the Hebrides used as a recruiting ground by the Norse king of Dublin. In that year Mael Sechnaill, king of Ireland, won the battle of Tara against "the Foreigners of Dublin and the Islands." After this defeat, Olaf, king of Dublin, laid down his kingship and retired into religious life in Iona, where he died not long later. The incident shows that the Norse islanders had by this time accepted Christianity, and that Iona, which they had barbarously ravaged again and again, had regained among them the religious prestige that it held before among the people of Ireland and Scotland.

About this time, the Danes, who first appear on our coasts in hostility to the Norwegians, established a kingdom of the Hebrides, under Godred, son of Harold. Godred invaded Dál Riada in Ulster in 989, and was killed there. His son Rögnvald became king of the Hebrides and died in 1005. With his death, the Danish kingdom in the islands appears to cease.