Among the 10,000 slaves crossing the Rappahannock for freedom with the Union in 1862 was John Washington. A literate slave from Fredericksburg, he settled in New York and wrote an account of the wartime events several years later. His manuscript was discovered in the 1990s. It was published as the basis of two books, David W. Blight's "A Slave No More" (2007), and "John Washington's Civil War: A Slave Narrative" (2008), edited by Crandall Shifflett. In 2010, the National Park Service, which manages the battlefield, Stafford County, and the City of Fredericksburg worked collaboratively to post new historical markers on either side of the Rappahannock River as part of a "Freedom Trail" to mark this exodus.