...n clear days we could see the fort at Harper's Ferry without a glass, and the flag flying over it, a mere speck against the sky, and we could hear the gun that was fired every evening at s unset. Shepherdstown 's only access to the river was through a narrow gorge, the bed of a small tributary of the Potomac, that was made to do much duty as it slipped cheerily over its rocks and furnished power for several...