...lar cavalry, and twenty-four pieces of artillery, eighteen of which were rifled guns. This column, as it crossed Bull Run, numbered over sixteen thousand men of all arms, by their own accounts. Burnside 's brigade, which here, as at Fairfax Court-House, led the advance, at about 9.45 A. M. debouched from a wood in sight of Evans's position, some five hundred yards distant from Wheat's battalion. ...