Sojourner Truth by

Sojourner Truth (~1797-November 26, 1883), born into slavery in New York, became a preacher, abolishonist, and women's rights activist once New York State abolished slavery in 1825. Her most famous speech was given in 1851, "Ain't I a Woman", in Ohio, at a Women's Rights Convention. She became known to Harriet Beecher Stowe, William Lloyd Garrison and Lucretia Mott.  Truth became an outspoken campainger for liberty and worked tirelessly throughout the Civil War.
I first came upon this little known woman while attending graduate school in New York State (SUNY @ New Paltz). The Library (of course) just happens to be named The Sojourner Truth Library.
I wasn't very familiar with the name, but soon learned of her quiet accomplishments.