- Joseph McGill, Diary of a Coal Mine Surveyor and Engineer, 1854/1987, bulk 1854/18561
- Lawrence Sherwood, Collector, Diaries, 1853/18701
- Lewis Family Papers, 1825/19361
- Logan Osborne Family and Business Records, 1761/19821
- Luke Wilcox (1795-1854) Diary, 1795/1879, bulk 1843/18541
- Margaret M. Simon, Compiler, "Trips from Ohio to New Germany in Preston County, Virginia 1826, 1833, 1835", 1825/19861
- Max Mathers Collection Papers, 1821/19571
- Maxwell Family Papers, 1845/2017, bulk 1845/19501
- Mrs. Lawrence M. Cox Papers, 1816/19401
- Nicholas Marmion, Physician, Family Papers, 1798/19511
- Ohio Historical Papers, 1776/18721
- Patrick Plummer Diary, 1859/18781
- Pauline Morehead Ash, Collector, Papers, 1855/19471
- Peter Larew Papers, 1790/18921
- Price's Tavern Ledger Books, 1821/18811