- Alfred Stieglitz / Georgia O'Keeffe Archive1
- Alhambra Natural Mineral Water Company1
- Allen, Albert Arthur, 1886-1962.1
- American Colonization Company1
- Arenas, Joaquín de.1
- Argonne Association of America1
- Arista, Mariano, 1802-1855 --Correspondence1
- Arkansas and Texas Land Company1
- Auburn Theological Seminary (New York, N.Y.)1
- Austin, Stephen F.--(Stephen Fuller),--1793-1836--Autograph, 18351
- B.W. Huebsch (Firm), publisher.1
- Backus, Azel,--1765-1817--Trials, litigation, etc.1
- Backus, Azel,--1765-1817.1
- Barnard, Thomas, 1728-18061
- Barrie, J. M. (James Matthew), 1860-19371
- Bedford, William Russell,--Duke of,--1613-1700.1
- Beebe, W.--Autograph.1
- Behrens, Johann Christoph1
- Beman, Amos Gerry,--1812-1874--Autograph.1
- Beman, Amos Gerry,--1812-1874--Presentation inscription from H.H. Garnet.1
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