- Botany--Correspondence91
- Paleontology79
- Ravenel, Henry William, 1814-188763
- Moore, Vivian May--Correspondence57
- Algae--Southern States46
- Invertebrates, Fossil--United States30
- Moore, Andrew Charles, 1866-1928--Correspondence30
- Moore, Mary Elizabeth Anderson, 1843-192122
- Geology--Correspondence18
- Woodrow, James, 1828-190718
- Ferns--Southern States17
- Fungi--Catalogs and collections--America15
- Shells--Catalogs and collections--History15
- Editors--South Carolina13
- Grasses--Southern States13
- Presbyterian Church--Newspapers13
- Presbyterian Church--Periodicals13
- Presbyterians--Southern States--History--19th century13
- South Carolina--Newspapers13
- Southern Presbyterian13