 Because of the time it took to deploy a full brigade into battle formation , Graham knew he needed to delay the French . He therefore ordered Browne , who had rejoined the division , to turn his single " Flankers " battalion of 536 men around and advance up the slope of the Barrosa Ridge against the 4 @,@ 000 men and artillery of Ruffin 's division . Colonel Barnard , who led the light battalion of Wheatley 's brigade , and Colonel Bushe , leading two light companies of Portuguese skirmishers , were ordered to attack through the woods to hold up Leval 's advance . 
