William "Billy" Costin (c. 1780 - May 31, 1842) was a free African-American activist and scholar who successfully challenged District of Columbia slave codes in the Circuit Court of the District of Columbia.
William "Billy" Costin (c. 1780 - May 31, 1842) was a free African-American activist and scholar who successfully challenged District of Columbia slave codes in the Circuit Court of the District of Columbia. (en)
William "Billy" Costin (c. 1780 - May 31, 1842) was a free African-American activist and scholar who successfully challenged District of Columbia slave codes in the Circuit Court of the District of Columbia. (en)