In the twilight the train carries us southwards through Pomerania, and before we reach Brandenburg the autumn evening has shrouded the North German lowland in darkness. The country is flat and monotonous; not a hill, hardly even an insignificant mound, rises above the level expanse. Yet the land has a peculiar attraction for the stranger from Sweden. He thinks of the time when Swedish gun-carriages splashed and dashed through the mud before the winter frost made their progress still more difficult and noisy. He thinks of heroic deeds and brave men, of early starts, and horses neighing with impatience at the reveille; of victories and honourable peaces, and of the captured flags at home. If he is observant he will find many other remembrances in the North German low country. Boulders of Swedish granite lie scattered over the plain. They stand out like milestones and mark the limits of the extension of the Scandinavian inland ice. During a colder period of the world's history all northern Europe was covered with a coat of ice, and this period is called the Ice Age. No one knows why the ice embraced Scandinavia and the adjacent countries and swept in a broad stream over the Baltic Sea. And no one knows why the climate afterwards became warmer and drier, and forced the ice to melt away and gradually to leave the ground bare. But we know for a fact that the boulders in northern Germany were carried there on the back of an immense ice stream, for they are composed of rocks which occur only in Scandinavia. The ice tore them away from the solid mountains; during its slow movement southwards it carried them with it, and when it melted the blocks were left on the spot. At last points of light begin to flash by like meteors in the night. They become more and more numerous, and finally come whole rows and clusters of electric lamps and lighted windows. We are passing through the suburbs of a huge city, one of the largest in the world and the third largest in Europe--Berlin. BERLIN If we spread out on the table a map of Europe on which all the railways are indicated by black lines, the map will look like a net with irregular meshes. At all the knots are towns, large centres of population which are in constant communication with one another by means of the railways. If we fix our eyes on North Germany, we see what looks like an enormous spider's web, and in the middle of it sits a huge spider. That spider is called Berlin. For as a spider catches its prey in an ingeniously spun net, so Berlin by its railways draws to itself life and movement not only from Germany but from all Europe--nay, from the whole world.