The reform, however, but slowly progressed. Ferdinand von Schill, a Prussian lieutenant, who had been wounded at Jena, formed, in Pomerania, a guerilla troop of disbanded soldiery and young men, who, although indifferently provided with arms, stopped the French convoys and couriers. His success was so extraordinary that he was sometimes enabled to send sums of money, taken from the enemy, to the king. Among other exploits, he took prisoner Marshal Victor, who was exchanged for Blucher. Blucher assembled a fresh body of troops on the island of Rugen. Schill, being afterward compelled to take refuge from the pursuit of the French in the fortress of Colberg, the commandant, Loucadou, placed him under arrest for venturing to criticise the bad defence of the place. The king of Sweden, Gustavus Adolphus IV., might with perfect justice have bitterly reproached Prussia and Austria for the folly with which they had, by their disunion, contributed to the aggrandizement of the power of France. He acted nobly by affording a place of refuge to the Prussians at Stralsund and Rugen. Colberg was, on Loucadou's dismissal, gloriously defended by Gneisenau and by the resolute citizens, among whom Nettelbek, a man seventy years of age, chiefly distinguished himself. Courbiere acted with equal gallantry at Graudena. On being told by the French that Prussia was in their hands and that no king of Prussia was any longer in existence, he replied, "Well, be it so! but I am king at Graudenz." Pillau was also successfully defended by Herrmann.[9] Polish Prussia naturally fell off on the advance of the French. Calisch rose in open insurrection; the Prussian authorities were everywhere compelled to save themselves by flight from the vengeance of the people. Poland had been termed the Botany Bay of Prussia, government officers in disgrace for bad conduct being generally sent there by way of punishment. No one voluntarily accepted an appointment condemning him to dwell amid a population inspired by the most ineradicable national hatred, glowing with revenge, and unable to appreciate the benefits bestowed upon them in their ignorance and poverty by the wealthier and more civilized Prussians.