William R. Phipps, John Cabell Breckinridge, c. 1855, Daguerreotype; Image: 7.1 x 6 cm (2 13/16 x 2 3/8"); Case Open: 9.4 x 16.2 x 1 cm (3 11/16 x 6 3/8 x 3/8"); Case Closed: 9.4 x 8.1 x 1.7 cm (3 11/16 x 3 3/16 x 11/16"), National Portrait Gallery, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643399756728-1643399811904-0

Untitled (Eight Atalanta Crewmen), July 30, 1856, Daguerreotype, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/27494

Charles Marville, Sky Study, Paris, 1856–57, albumen print from wet collodion negative, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/154075