Frederick William, the Great Elector, has been exemplary for many of his successors. Frederick the Great rightly considered him the most able of the previous Princes of the house of Hohenzollern, while the present German Emperor has made a special cult of his memory, and assuredly had a symbolic intention when he appeared at a fancy-dress ball disguised as the first of his ancestors who equipped a fleet and founded a colony. When Frederick William was called to the Brandenburg throne in 1641 at the age of twenty, Germany was still in the throes of the Thirty Years' War, and no part of the Empire had suffered more than his Electorate from the consequences of that unspeakable calamity. Of all the causes which have contributed to impede the normal development of the painstaking and industrious German race, none had so malign an influence as that stupendous conflict. It not merely delayed civilization, but over vast tracts of country positively exterminated it. At the close of the war many once flourishing towns had absolutely disappeared from the face of the earth, and where formerly a numerous peasantry had tilled its fertile fields a howling wilderness extended in all directions as far as the eye could reach. In North Germany to-day an apparently purposeless pond, or a detached clump of venerable trees, still shows where once a village stood, and bears mute witness to the ruthless barbarity with which the religious partition of Central Europe was brought about. When an end was put to the bloodshed and rapine by the Peace of Westphalia (1648), the population of Germany had been reduced to one half--in some districts to one tenth--of its former dimensions. Many portions of the Empire are even to-day not so thickly inhabited as they were before the war. Industry and commerce had migrated to England, France, and Holland; and Leipzig and Frankfort were the only German towns that had retained any trade worthy of mention. The Hansa, with its fleets of warships and merchantmen, was but a memory of the past. Königsberg had no longer a ship of its own; the trade of Dantzig and Stettin was almost entirely carried in foreign bottoms; and even Hamburg, which directly had been but comparatively little touched by the thirty years of chaos and turmoil, and had benefited from its exceptional connection with England, was left commercially crippled. At a Hanse Parliament held in 1630, only Hamburg, Lübeck, and Bremen were represented. Germany had been so drained of money that barter had generally taken the place of purchase by coin; wages were paid in the products of labour, grain, ore, and manufactured goods, and even state officials in some cases received their salaries in kind.