Names
- Keystone View Company.1
- Kilburn, B. W. (Benjamin West), 1827-1909.1
- King, Julia Wiggin, 1828-1904.1
- King, Thomas Starr, 1824-1864.1
- Kuhler, Otto, 1894-1977.1
- Langenheim, Frederick, 1809-1879.1
- Lawrence, Abbott, 1792-1855--Portraits.1
- Lawton, Henry Ware, 1843-1899.1
- Lawton, Mary Craig, 1855-1934.1
- Lee, Fitzhugh, 1835-1905.1
- Lee, Robert E. (Robert Edward), 1807-1870.1
- Legaspi, Silvestre.1
- Leiper, Edward F.1
- Lincoln, Abraham, 1809-1865.1
- Lincoln, Mary Todd, 1818-1882.1
- López, Narciso, 1797-1851.1
- Maceo, José, 1846-1896.1
- Maceo, José M.1
- Macondray, Frederick William, 1803-1862.1
- Maine (Battleship)1