...nnecting with Jackson's right and thus extending the investment from the Shenandoah to the Potomac below Harper's Ferry. Longstreet's command was to follow Jackson across the Blue ridge and halt at Boonsboro , in the Great valley, at the western foot of the mountain. McLaws, with his own and Anderson's division, was to follow Longstreet as far as Middletown, in the Catoctin valley, and there turn to the...