As this battery commanded the walls of the town, and flanked the bridge across the Danube, the position of the defenders was now seriously menaced, but the Duke of Saxe-Lauenburg refused the demand of Gustavus to surrender.

The battery now opened fire, first demolishing a large stone building by the river occupied by a force of Imperialists, and then directing its fire upon the city gates.
The cannonade continued after nightfall, but in the darkness a body of Imperialist horsemen under Colonel Cronenberg dashed out at full speed through the gate, cut a passage through the musketeers in the suburb, galloped up the hill, and fell upon the infantry and artillery in the battery.

So furious was their charge that the greater part of the defenders of the battery were cut down.

The guns were spiked, and the cavalry, having accomplished their purpose, charged down the hill, cut their way through the suburb, and regained the town.
This gallant exploit deranged the plans of the Swedes.

Gustavus reconnoitred the town accompanied by Sir John Hepburn, and by the advice of that officer decided upon a fresh plan of operations.