It is especially in this obscure field of research that the eminent Danish scholar, Vilhelm Thomsen, has rendered inestimable services to European ethnology. By the light of his linguistic studies A. H. Snellman[716] has elucidated the origins of the Baltic Finns, the Proto-Esthonians, the now all but extinct Livonians, and the quite extinct Kurlanders, from the time when they still dwelt east and south-east of the Baltic lands, under the influence of the surrounding Lithuanian and Gothic tribes, till the German conquest of the Baltic provinces. We learn from Jordanes, to whom is due the first authentic account of these populations, that the various Finnish tribes were subject to the Gothic king Hermanarich, and Thomsen now shows that all the Western Finns (Esthonians, Livonians, Votes, Vepses, Karelians, Tavastians, and others of Finland) must in the first centuries of the new era have lived practically as one people in the closest social union, speaking one language, and following the same religious, tribal, and political institutions. Earlier than the Gothic was the Letto-Lithuanian contact, as shown by the fact that its traces are perceptible in the language of the Volga Finns, in which German loan-words are absent. From these investigations it becomes clear that the Finnish domain must at that time have stretched from the present Esthonia, Livonia, and Lake Ladoga south to the western Dvina. The westward movement was connected with the Slav migrations. When the Slavs south of the Letts moved west, other Slav tribes must have pushed north, thus driving both Letts and Finns west to the Baltic provinces, which had previously been occupied by the Germans (Goths). Some of the Western Finns must have found their way about 500 A.D., scarcely earlier, into parts of this region, where they came into hostile and friendly contact with the Norsemen. These relations would even appear to be reflected in the Norse mythology, which may be regarded as in great measure an echo of historic events. The wars of the Swedish and Danish kings referred to in these oral records may be interpreted as plundering expeditions rather than permanent conquests, while the undoubtedly active intercourse between the east and west coasts of the Baltic may be explained on the assumption that, after the withdrawal of the Goths, a remnant of the Germanic populations remained behind in the Baltic provinces.