In the spring of 1848 seventy-six slaves from the nation's capital hid aboard a schooner called the Pearl in an attempt to sail down the Potomac River and up the Chesapeake Bay to freedom in Pennsylvania. When inclement weather forced them to anchor for the night, the fugitive slaves and the ship's crew were captured and returned to Washington. Many of the slaves were sold to the Lower South, and two men sailing the Pearl were tried...