Strathclyde rapidly adopted the tongue of its masters, and grew as English in language (though not in blood) as the Lothians themselves.

Fife, in turn, was quickly Anglicised, as was also the whole region south of the Highland line.

Thus a new and powerful kingdom arose in the North; and at the same time the cession of an English district to the Scottish kings had the curious result of thoroughly Anglicising two large and important Celtic regions, which had hitherto resisted every effort of the Northumbrian or West Saxon over-lords.

There is no reason to believe, however, that this introduction of the English tongue and English manners was connected with any considerable immigration of Teutonic settlers into the Anglicised tracts.

The population of Ayrshire, of Fife, of Perthshire, and of Aberdeen, still shows every sign of Celtic descent, alike in physique, in temperament, and in habit of thought.