Tacitus on Germany

The whole of Germany is thus bounded; separated from Gaul, from Rhoetia and Pannonia, by the rivers Rhine and Danube; from Sarmatia and Dacia by mutual fear, or by high mountains: the rest is encompassed by the ocean, which forms huge bays, and comprehends a tract of islands immense in extent: for we have lately known certain nations and kingdoms there, such as the war discovered. The Rhine rising in the Rhoetian Alps from a summit altogether rocky and perpendicular, after a small winding towards the west, is lost in the Northern Ocean. The Danube issues out of the mountain Abnoba, one very high but very easy of ascent, and traversing several nations, falls by six streams into the Euxine Sea; for its seventh channel is absorbed in the Fenns.