...r protected by Lieut. Drummond's cavalry company. On the way, large reinforcements met us, and other divisions of the corps d'armee were seen pouring down by the northern roads. They joined us at Centreville , where all rested for the night, excepting the picket-guards, which were thrown out far toward Bull Run, and a single troop of cavalry, which encamped about two miles from the scene of the contest. ...