eight o'clock
Hepburn marching on behind heard the din of musketry and pressed forward ; before reaching the town he found a place in the swamp sufficiently firm to enable his men to march across it , and , turning off , he led his troops between the town and the redoubt , and then attacked the latter in the rear where its defences were weak , and after three minutes ' fighting with its surprised and disheartened garrison the latter surrendered . The redoubt having fallen , and Munro 's men having effected a lodgment in the town , while the retreat on one side was cut off by the force of Gustavus , and on the other by a strong body of cavalry under Marshal Horn , the governor sent a drummer to Colonel Munro to say that he was ready to surrender , and to ask for terms . The drummer was sent to Gustavus , who agreed that the garrison should be allowed to march away with the honours of war , taking their baggage and effects with them . Accordingly at eight o'clock the Count of Gratz at the head of his soldiers marched out with colours flying and drums beating , and retired into Silesia . A garrison was placed in Landsberg , and the blacksmith appointed burgomaster of the town . Landsberg fell on the 15th of April , and on the 18th the force marched back to Frankfort . In spite of the urgent entreaties of Gustavus and the pressing peril of Magdeburg , the wavering Duke of Brandenburg could not bring himself to join the Swedes .