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Thomas Clarkson
Arthur Conan Doyle
William G. Allen
Carter G. Woodson
Thomas Wentworth Higginson
W. E. B. Du Bois
Olaudah Equiano
William Still
Frederick Douglass
Harriet Jacobs
Various
David Walker
Solomon Northup
Booker T Washington
Theodore Tilton
Ida B. Wells-Barnett
Ellen Craft and William Craft
Henry David Thoreau