From NKAA, Notable Kentucky African Americans Database (main entry)
Cyrus, Mary Clark(born: 1824 - died: 1908)
Mary Clark Cyrus, born free in Kentucky, moved to Detroit, MI, with her husband in 1844. She is recognized for her role as a leader in the Underground Railroad as a member of the the Detroit Anti-Slavery Society.
For more see Hine Sight: Black Women and the Re-Construction of American History, by D. C. Hine.