When Harriet Tubman engaged with the Underground Railroad, she joined a secret network of people who believed it was time to end slavery. Although enslaved people had long seized opportunities to flee to freedom, by the 1830s a diverse group of like-minded people were actively helping slaves escape. Some risked their lives in the dangerous and unlawful work of hiding, transporting, feeding, or clothing escapees, while others worked to expand the organized antislavery movement and political sentiment. William Still worked for the Vigilance Committee in Philadelphia, Pennsylvania, and secretly kept records of the slaves he helped to freedom. Thomas Garrett, a Quaker merchant in Wilmington, Delaware, provided food, money, and shoes to slaves on their way to William Still in Philadelphia. Samuel Green, a free Methodist minister and Underground Railroad conductor in Dorchester County, Maryland, saw Harriet help guide his son to freedom in 1854, and Green was imprisoned in 1857 for possessing a copy of Harriet Beecher Stowe’s anti-slavery novel Uncle Tom’s Cabin. Frederick Douglass, born in Talbot County, Maryland, in 1818 and escaped from slavery in 1838, became an author, orator, and leader in the antislavery movement.