" The future Harriet Tubman was born a slave in Dorchester County, Maryland, in 1822. In 1844 she married a free man, John Tubman. Five years later, fearing that she was about to be sold, Tubman tapped into a local network, received two names of safe houses from a white neighbor, and fled north toward Philadelphia. The journey was terrifying and mystical. She navigated using the North Star; she may have followed the drinkiri gourd, a code name for the Big Dipper; and in a clear homage to the Israelites’ flight from Egypt, she recalled that she felt led by an “invisible pillar of cloud by day, and of fire by night. "

― Bruce Feiler , America's Prophet: Moses and the American Story