This informal network of safe houses and transport facilities was established by 19th century US abolitionists in the northern states prior to the Civil War. Volunteers, or “conductors,” offered sanctuary and assistance to escaped African-American slaves and helped lead the slaves to safety in the North. Conductors on the railroad included escaped slaves like Harriet Tubman, who is credited with having led more than 300 slaves to freedom. Who was the “Father of the Underground Railroad”? Discuss