Barnes's left flank, in turn, was the British main body; the centre companies of the 49th (160 men) under Lieutenant Colonel Charles Plenderleath on the right and six companies (300 men) of the 2/89th on the left under Morrison himself. Morrison stated that he disposed one each of his three 6-pounder guns to support each of his three detachments (Pearson, Barnes and the main body). However, various sources state that while the militia gun was posted with Pearson, the two 6-pounder guns of the Royal Artillery under Captain H. G. Jackson occupied a small hillock behind the 49th, and fired over their heads during the engagement. Action Boyd did not order an assault until the middle of the afternoon. On the American right, the 21st U.S. Infantry under Colonel Eleazer Wheelock Ripley advanced and drove the British skirmish line back through the woods, for almost a mile. Here they paused, and were joined by the 12th and 13th U.S. Infantry from Coles' brigade. (Where Swartwout's other two regiments were at this point is unclear.) Ripley and Coles resumed their advance along the edge of the woods, but were startled to see a line of redcoats (the 2nd/89th, on Morrison's left flank) rise up out of concealment and open fire. The American soldiers dived behind tree stumps and bushes to return fire, and their attack lost all order and momentum. As ammunition ran short, they began to retreat out of line. Meanwhile, Covington's brigade struggled across the ravine and deployed into line, under musket and shrapnel fire. Legend has it that at this point, Covington mistook the battle-hardened 49th Regiment in their grey greatcoats for Canadian Militia and called out to his men, "Come on, my lads! Let us see how you will deal with these militiamen!" A moment later, he was mortally wounded. His second-in-command took over, only to be killed almost immediately. The brigade quickly lost order and began to retreat. Boyd could not bring all his six guns into action until his infantry were already falling back. When they did open fire from the road along the river bank, they were quite effective. Morrison's second-in-command, Lieutenant Colonel John Harvey, ordered the 49th to capture them. The 49th made a charge in awkward echelon formation, suffering heavy casualties from the American guns as they struggled across several rail fences. The United States Dragoons (under Wilkinson's adjutant general, Colonel John