...d there during the night, and were now engaged with our cavalry, who soon drove them away. Pretty soon the sound of cannon, in the direction of Auburn, announced that the Rebels, marching down from Warrenton , had attacked General Warren's rear. He, however, held them in check easily with one division, while the other two marched along, passing our Headquarters at 9.30 A. M. As they went on, I recognize...