...he western side of the Shenandoah, and on the 18th, from the vicinity of Millwood, ordered Longstreet and Hill to follow Ewell across the Potomac, satisfied that by so doing he would draw Hooker into Maryland . Hill crossed the Potomac at Shepherdstown on the 18th, followed by Longstreet except McLaws' division, which was left with Stuart to watch the passes of the Blue ridge and the roads of the Shenand...