Abolitionists, Free Blacks, and Runaway Slaves: http://www.udel.edu/BlackHistory/abolitionists.html

Autobiography of Frederick Douglass: http://odur.let.rug.nl/~usa/B/fdouglas/dougxx.htm

Frederick Douglass Papers: http://www.pbs.org/wgbh/aia/part4/4p1539.html

Freedmen and Southern Society: http://www.history.umd.edu/Freedmen/

Life of Harriet Tubman: http://www.nyhistory.com/harriettubman/life.htm