...of Sharpsburg and the road leading thence southward toward the Potomac. That same hour brought A. P. Hill up from Boteler's ford, and across to the commanding plateau along which runs the road from Sharpsburg to the mouth of the Antietam. His men were wearied by a march of 17 miles, including the fording of the Potomac, in seven hours, but the fiery Hill, who was always ready and impatient to begin a fi...