What were the African American contributions to the abolitionist movement?

Question

What were the different tactics that black abolitionist used to fight slavery?

Answer 1

http://www.digitalhistory.uh.edu/database/article_display.cfm?HHID=55

http://www.cerritos.edu/soliver/American%20Identities/Black%20abolitionists/black_abolitionists.htm

(Broken Link Removed)

http://www.pbs.org/wgbh/aia/part4/4narr2.html