Collection
- Margaret M. Simon, Compiler, "Trips from Ohio to New Germany in Preston County, Virginia 1826, 1833, 1835", 1825/19861
- Mary Kelley and Jacob Hartman Letters, 1889/19521
- Melvin C. Snyder, Congressman, Papers, 1946/19531
- Methodist Episcopal Church, Oakland District, Records, 1895/19101
- Michael Anthony Cover, Collector, Papers, 1844/19021
- Michael K. Johnson, Collector, Papers, 1830/19581
- Morrison, Gross and Company, Records, 1917/19501