- Revised and expanded with recently uncovered information - Detailed maps of escape routes and networks - Eyewitness accounts of fugitives Organized in antebellum America to help slaves escape to freedom, the Underground Railroad was cloaked in secrecy and operated at great peril to everyone involved. The system was extremely active in Pennsylvania, with routes running through cities and towns in all parts of the state.This revised second edition retraces the routes with detailed maps, discusses the large city networks, identifies the houses and sites where escapees found refuge, and records the names of the people who risked their lives to support the operation.