Mentioned by thegaslightinn.com
Museums & History | The Gaslight Inn Bed & Breakfast
"As early as the late 1700's Africans were brought to Gettysburg as slave labor. In the course of time others would arrive as free men. It is not widely known that while much of the nation lay in the grip of slavery, approximately 180 African Americans living a mere ten miles north of the Mason-Dixon Line lived as free men and women in Gettysburg."