¹     For many years, slavery was a part of the history of the United States. In the early 1800s, though, the country began to split into two over whether slavery should be allowed or not.
 
²     Those who believed slaves should be free tried to help them escape. Safe houses became part of the Underground Railroad. Guides called "conductors" took the slaves to places where "station masters" kept them hidden until it was safe to travel north for freedom.
 
³     Many slaves were fleeing from Virginia and Maryland and escaped through Delaware. The Underground Railroad began in Dover, Delaware, and ran through Wilmington into Pennsylvania. Many slaves escaped this way.

Paragraphs 4 to 9:
For the complete story with questions: click here for printable