Collection
- Latin American ephemeral publications collection, 1861-20091
- Lawrence G. Abele Collection, 1816-1995, bulk 1960-19891
- Leo Clark Collection, 1841-19211
- Lesley family papers, 1700-1950, bulk 1850-19501
- Letters of Confederate Soldiers, 1861-1865, Date acquired: 03/05/19641
- Levi Marrero Collection, bulk date unknown1
- Lewis Bank papers, 1854-1957, Date acquired: 03/10/1966, bulk 1871-19251
- Lewis S. Moore Collection, 1862-19311
- Lois Deicke Rare Tropical Fruits and Vegetables Book Collection, 1811-19841
- Louise Richardson family letters, 1846-18781
- Love-Scarborough Papers, 1835-1936, Date acquired: 05/25/19591
- Loy Glenn Westfall Cigar Industry Research collection, 1860-1982, Date acquired: 00/00/20151
- MacGowan Gift, 1825-1959, Date acquired: 01/01/1968, bulk 1825, 1831, 1928, 19591
- Mahan collection of American humor and cartoon art, 1813-2005, Date acquired: 00/00/2006, bulk 1928-19651
- Major James Lucius Cross Correspondence, 1861-1865, Date acquired: 00/00/1993, bulk 1861-18621
- Manuscripts – Single Items Collection, 1818-19711
- Marion Rinhart Photographs Collection, 1860-1952, bulk 1875-19341
- Marvin & Sybil Weiner Spirit of America Collection Pamphlets -- Speeches, 1746-19321
- Marvin Dunn Collection, bulk 1843-20091
- Marvin and Sybil Weiner Spirit of America Collection -- Manuscripts, 1663 - 1977, Date acquired: 11/00/20121