...ge, as I might find most advisable; to strike Hunter's force in the rear, and, if possible, destroy it; then to move down the Valley, cross the Potomac near Leesburg in Loudoun County, or at or above Harper's Ferry , as I might find most practicable, and threaten Washington City. I was further directed to communicate with General Breckenridge, who would co-operate with me in the attack on Hunter and the expedi...