...ection of the Potomac. We crossed the river about the middle of the same month, and marched into Pennsylvania. Hill's and Ewell's corps were in advance, and were reported to be in the vicinity of Carlisle . Whilst lying in camp, not far distant from Chambersburg, information was received that Ewell and Hill were about to come in contact with the enemy near Gettysburg. My troops, together with McLaw...