- Langston Baptist Church (Laurens County, S.C.)1
- Larks3
- Lee, Robert E. (Robert Edward), 1807-18701
- Legislators--United States1
- Leslie, Frank, 1821-18801
- Letter writing2
- Letters6
- Lincoln, Abraham, 1809-1865--Cartoons and caricatures.1
- Local finance--South Carolina1
- Logbooks4
- Loggerhead shrike1
- Loggerhead turtle1
- Mann, Mary Tyler Peabody, 1806-1887--Political and social views1
- Maps2
- Marmots1
- Marsh, Caroline Crane, 1816-19011
- Marsh, George P. (George Perkins), 1801-18821
- Maryland--History--Civil War, 1861-1865--Maps2
- Massachusetts State House (Boston, Mass.)--Pictorial works.1
- McBee, Vardry, 1775-18641