- A. K. Fulton and A. S. Fulton Ledger, 1861/18651
- Abraham Davenport Ledger, 1804/18331
- Abraham Grove Account Book, 1815/18501
- Account Book of Unknown Merchant, 18581
- Account Ledger and Diary (Upstate New York), 1886/1907, bulk 1890/19001
- Adam Rinica and George Rinica Account Book, 1822/18481
- Adams Brothers and Payne Building Supplies Company Ledger, 18871
- Albemarle Female Institute (Va.) Ledger, 1857/18581
- Alexander Hamilton, Jr. Letters, 1832/18331
- Alfred Parkins Ledgers, 1845/18541
- Amos Johnson Ledgers, 1808/1861, bulk 1808/18211
- Ancient Order of United Workmen. Coldwater Legion No. 8 (Michigan) Ledger, 1885/18961
- Anderson Benskin Smith, Sr. Ledgers, 1916/1938, bulk 1916/19361
- Andrew Kincannon Ledger, 1808/18371
- Andrew Steele Fulton Account Books, 1825/18341