The same table still further shows that the names ending in by, thorpe, toft, beck, næs, and ey, appear chiefly in the flat midland counties of England; whereas, farther towards the north, in the more mountainous districts, these terminations mostly give place to those in thwaite, and more particularly to those in dale, force, tarn, fell, and haugh. This difference, however, is scarcely founded on the natural character of the country alone; it may also have arisen from the different descent of the inhabitants. For although in ancient times Danish and Norwegian were one language, with unimportant variations, so that it would scarcely be possible to decide with certainty in every single case whether the name of a place be derived from the Danes or from the Norwegians; yet it may reasonably be supposed that part at least of the last-mentioned names are Norwegian; namely, those ending in ——dale (as Kirk-dale, Lang-dale, Wast-dale, Bishops-dale); in ——force (as Aysgarth-force in Yorkshire, High-force, and Low-force, in the river Tees, and in the stream called “Seamer Water”); in ——fell (old Norwegian, fjall; Mickle-fell, Cam-fell, Kirk-fell, Middle-fell, Cross-fell); in ——tarn (_Old Nor._, tjörn, or tjarn, a small lake); and in ——haugh (as in Northumberland, Red-haugh, Kirk-haugh, Green-haugh, Windy-haugh). Exactly similar names are met with to this day in the mountains of Norway; whilst they are less common, or altogether wanting, in the flat country of Denmark. That Norwegians also immigrated into England, even in considerable numbers, both history and the frequently occurring name of Normanby in the north of England, clearly show; but they appear to have betaken themselves chiefly to the most northern and mountainous districts, which not only lay nearest to them, but which in character most resembled their own country. In this respect it deserves to be noticed, that places whose names end in _tarn_, and are consequently pure Norwegian, are found only in the most northern counties; and that those in _haugh_—although there are names of places in Denmark ending in _höi_ (hill)—must also, from the form, be Norwegian. They are found exclusively in the present Northumberland, and within the Scotch border.