- Bradford Laidley Papers, 1755/19911
- Braxton County (W. Va.) Court Records and Miscellaneous Papers, 1830/19535
- Brooke County (W. Va.) Court Records and Miscellaneous Papers, 1780/191813
- Brooks F. McCabe, Collector, Papers, 1770/20191
- Brown Family Papers, Photographs and Maps, 1765/19591
- Byer Family Genealogy, 1726/19381
- Campbell Family Papers, 1795/18731
- Charles James Faulkner (1806-1884) Papers, 1786/18781
- Charles James Faulkner (1806-1884) Papers, 1786/18921
- Charles L. Campbell (b. 1876), Compiler, Typescripts, 1789/19561
- Charles Shetler, Curator and Historian, Papers, 1700/19651
- Christ Reform Church of Shepherdstown, West Virginia, Records, 1779/19571
- Churches of Somerset County, Pennsylvania, Records, 1775/19331
- Clarence Edwin Smith (1885-1959) Papers, 1787/19572
- Clarence Edwin Smith (1885-1959), Barns Family Papers, 1795/19081