books.google.ca - Since the nineteenth century, the Ohio River has represented a great divide for African Americans. It provided a passage to freedom along the underground railroad, and during the industrial age, it was a boundary between the Jim Crow South and the urban North. The Ohio became known as the "River Jordan,"...http://books.google.ca/books/about/River_Jordan.html?id=iZiE33RZKcIC&utm_source=gb-gplus-shareRiver Jordan
