Image description: Illustrations from A history of the Underground Railroad by Wilbur H. Siebert with an introduction by Albert Bushnell Hart. Image 1 is a photograph portrait of William Still. Image 2 is a photographic portrait of Harriet Tubman. Image 3 is a photographic portrait of Thomas Garrett. Image 4 is a detailed map of routes on the Underground Railroad showing routes to Canada through the northeast and midwest.