The Lion of the North: A Tale of the Times of Gustavus Adolphus. Henty George Alfred

in the fact that from its great strength its garrison dominated the whole district known as the Marc of Brandenburg. It was the key to Silesia, and guarded the approaches to Pomerania, and its possession was therefore of supreme importance to Gustavus. The garrison consisted of five thousand Imperialist infantry and twelve troops of horse, the whole commanded by Count Gratz. The principal approach to the town was guarded by a strong redoubt armed with numerous artillery.

      Colonel Munro had advanced his trenches to within a short distance of this redoubt, and had mounted the twelve pieces of cannon to play upon it, but so solid was the masonry of the fort that their fire produced but little visible effect. Gustavus had brought from Frankfort as guide on the march a blacksmith who was a native of Landsberg, and this man had informed him of a postern gate into the town which would not be likely to be defended, as to reach it it would be necessary to cross a swamp flanked by the advanced redoubt and covered with water.