si-african-american-history: Carte-de-visite portrait of Harriet Tubman, 1868-1869, Smithsonian: Nat
si-african-american-history: Carte-de-visite portrait of Harriet Tubman, 1868-1869, Smithsonian: National Museum of African American History and CultureSize: H x W (Image): 3 11/16 × 2 ¼ in. (9.4 × 5.7 cm)Medium: albumen and silver on photographic paper on card mounthttps://nmaahc.si.edu/object/nmaahc_2017.30.47 -- source link