From the tenth century to the present, however, the history of Europe is that of one continuous evolution, slow, discouraging at times, with many tragedies to record and many humiliations to be lived down. But all in all, no century from that to this has ended without some signal achievement in one line or another, in England, in France, in Italy, or in Germany. By the middle of the tenth century the first unyielding steps had been taken when the Saxon kings of Germany began to build their walled towns along the upper Elbe, and to plant the German colonists along the eastern frontiers, as Rome had long before shielded the northern frontiers of civilisation. By the end of the century the Magyars have settled in the middle Danube, under a king at once Christian and saint, and the greatest king of the Danes is champion of Christendom. In another fifty years the restless Normans are off on their conquests again, but now they carry with them to England and to Italy the invigorating touch of a youthful race who are in the front of their time, and not its enemies. This new movement of the old Viking stock did good rather than harm in its own day, but it has done immeasurable harm to history. For writers and readers alike have turned at this point from the solid story of progress to follow the banners of these wandering knights, to live in the unreal world of chivalry at the hour when the whole society of Europe was forming itself into the nations of to-day, when the renaissance of commerce was building cities along all the highways of Europe, and the schools were crowded with the students of law and philosophy. From such a broad field of vital interests we are turned aside to follow the trail of some brutal noble who wins useless victories that decide nothing, or besieges cities to no discoverable purpose, and leaves a transient princedom for the spoil of his neighbours. These are the common paths of history through the Middle Ages, and what wonder if they are barren, in the track of such men.