...then crossed the Potomac, was soon followed by A. P. Hill, and Longstreet brought up the rear. Ewell lead the advance into Pennsylvania--Longstreet followed in rear. The latter had passed through Chambersburg with two of his divisions, and these, together with A. P. Hill's corps, lay along the Chambersburg and Gettysburg road, around the village of Fayetteville. Ewell had marched towards Carlisle and Ha...