- Gideon D. Camden (1805-1891) Letter, 18491
- Gideon D. Camden (1805-1891) Papers, 1784/18991
- Gideon D. Camden (1805-1891) Papers, 1784/19581
- Gideon D. Camden (1805-1891) Papers, 1816/18921
- Harvey W. Harmer (1865-1961) Papers, 1842/19611
- Hook, Schrader and Company Account Books of a Horse-Drawn Carriage Company, 1872/18831
- J.B. Ford Correspondence, 18631
- J.B. Ford Legal Papers, 18771
- Jacob H. Gerbrick, Photographer, Records, 1857/19741
- James A. Wilding Metropolitan Washington Airports Authority notebooks, 1974/20031
- James Everhart Letter, 18431
- John R. Hamburg Transportation papers1
- Jonathan Gifford transportation collection, 1919/19991
- Log Books of the Steamboat "Sonoma", 18841
- Loudoun Station collection, 2001/20031