- A. J. Davis Family Collection, 1874/2007, bulk 1874/19071
- Alexander McNutt Glasgow Family Papers, 1823/19036
- Alexander Von Humboldt Portrait Print, 1855/18901
- Andrew Given Family Correspondence, 1859/18861
- Anna Burton Ellett Collection, 1751/19321
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19992
- Asa F. Horn Account Book and Family Correspondence, 1854/18613
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- Bailey-Law Collection, 1825/19716
- Baltimore, Maryland, Letter, 18602
- Barclay Shipping Ledger, 1847/18782
- Bark Lorena Ship Records, 1860/18712
- Barnes Family Correspondence, 1860/18642
- Barry-Parker Family Letters, 1855/18602
- Baughman Family Papers, 1837/19685