General William Maxwell's brigade, which had been held in reserve, was brought forward to storm Cliveden, partially led by a volunteer aide from General Washington's own staff, Lieutenant Colonel John Laurens, who had been shot through his right and therefore dominant shoulder earlier in the battle; he had continued to fight with his aide riband wrapped around his arm and his sword in his left and non-dominant hand. Knox positioned four 3-pound cannon out of musket range to bombard the mansion. However, the thick walls of Cliveden withstood the bombardment from the light field guns. The Americans launched a second wave of infantry assaults, all of which were repulsed with heavy losses. The few Americans who managed to get inside the mansion were shot or bayoneted. It was becoming clear to the Americans that Cliveden was not going to be taken easily. Among this assault was Lieutenant John Marshall of the Virginia Line, the future Chief Justice of the United States, who was wounded during the attack.