From BATTLE LINES, Prince George’s County in the Civil War:
"The lines to freedom – now called the “Underground Railroad” - often ran directly through Prince George’s County from Southern Maryland. Many of the slaves slipped to Washington which had a large, free black population."
"These new lines of freedom crisscrossed the country, many unsettled until well into the 20th century. But one more line of anger and confusion ran through Prince George’s County – the line of escape for John Wilkes Booth and the Surratt family."
Prince George's County's place on the John Wilkes Booth Escape Route Tours.