Columbia subject headings:
Antislavery movements--United States.
Douglass, Frederick, 1818-1895.
Slavery--Maryland.
Harvard subject headings:
Antislavery movements--United States
Douglass, Frederick, 1818-1895
Slavery--Maryland
Princeton subject headings:
Antislavery movements--United States.
Douglass, Frederick, 1818-1895.
Slavery--Maryland.