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- Campbell Family Papers, 1847/19011
- Carleton Custer Pierce (1877-1958) Papers, 1840/19551
- Charles E. Krebs (1870-1954) Papers, 1912/19391
- Charles H. Freeman, (1854-1919), Engineer, Letter Book, 1908/19111
- Charles L. Campbell (b. 1876), Compiler, Typescripts, 1789/19561
- Charles McCamic (1874-1956) Papers, 1919/19561
- Equality Oil Company Corporation Book, 1908/19111
- Eugene Levassor Papers, 1796/18941
- Gideon D. Camden (1805-1891) Papers, 1784/19581
- Gideon D. Camden (1805-1891) Papers, 1816/18921
- Gordon M. Buck papers, 1881/1956, bulk 1910/19401
- H.E. Matheny, Collector and Compiler, Papers, 1956/19611
- Harley Martin Kilgore (1893-1956), Senator, Papers and Artifacts, 1940/19561
- Herbert P. McGinnis Papers, 1908/19671