His two grand Feats that dwell in the Prussian memory are perhaps none of his greatest, but were of a kind to strike the imagination. They both relate to what was the central problem of his life--the recovery of Pommern from the Swedes. Exploit First is the famed Battle of Fehrbellin (Ferry of Belleen), fought on June 18, 1675. Fehrbellin is an inconsiderable Town still standing in those peaty regions, some five-and-thirty miles northwest of Berlin, and had for ages plied its poor Ferry over the oily-looking, brown sluggish stream called Rhin, or Rhein in those parts, without the least notice from mankind till this fell out. It is a place of pilgrimage to patriotic Prussians ever since Friedrich Wilhelm's exploit there. The matter went thus: Friedrich Wilhelm was fighting, far south in Alsace, on Kaiser Leopold's side, in the Louis XIV War--that second one, which ended in the Treaty of Nimwegen. Doing his best there, when the Swedes, egged on by Louis XIV, made war upon him; crossed the Pomeranian marshes, troop after troop, and invaded his Brandenburg Territory with a force which at length amounted to sixteen thousand men. No help for the moment; Friedrich Wilhelm could not be spared from his post. The Swedes, who had at first professed well, gradually went into plunder, roving, harrying at their own will; and a melancholy time they made of it for Friedrich Wilhelm and his People. Lucky if temporary harm were all the ill they were likely to do; lucky if---- He stood steady, however; in his solid manner finishing the thing in hand first, since that was feasible. He then even retired into winter-quarters to rest his men, and seemed to have left the Swedish sixteen thousand autocrats of the situation, who accordingly went storming about at a great rate. Not so, however; very far, indeed, from so. Having rested his men for certain months, Friedrich Wilhelm silently, in the first days of June, 1675, gets them under march again; marches his Cavalry and he as first instalment, with best speed from Schweinfurt, which is on the River Mayn, to Magdeburg, a distance of two hundred miles. At Magdeburg, where he rests three days, waiting for the first handful of Foot and a field-piece or two, he learns that the Swedes are in three parties wide asunder, the middle party of them within forty miles of him. Probably stronger, even this middle one, than his small body (of "Six thousand Horse, Twelve hundred Foot, and three guns")--stronger, but capable, perhaps, of being surprised, of being cut in pieces before the others can come up? Rathenau is the nearest skirt of this middle party: thither goes the Kurfuerst, softly, swiftly, in the June night (June 16-17, 1675); gets into Rathenau by brisk stratagem; tumbles out the Swedish Horse regiment there, drives it back toward Fehrbellin.