<p>Historian Andrew Diemer on William Still, a Philadelphia abolitionist who led hundreds of enslaved people to freedom. His new biography is "Vigilance." </p>

Historian Andrew Diemer on William Still, a Philadelphia abolitionist who led hundreds of enslaved people to freedom. His new biography is "Vigilance."

William Still: Father of the Underground Railroad

Radio Times is an intelligent talk show dealing with issues of the Delaware Valley, as well as issues of national and global concern. Radio Times is produced by WHYY in Philadelphia.

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William Still: Father of the Underground Railroad

William Still: Father of the Underground Railroad

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