- Beman, C. T.--Autograph.1
- Bentun, Rebeckah--Ownership1
- Boulton, Matthew, 1728-18091
- Bronson, Enos, 1774-1823.1
- Burke, Edmund,--1729-1797.--Reflections on the Revolution in France.1
- Burr, Aaron,--1756-1836.1
- California Silk Culture Association.1
- Camacho, Sebastian, 1791-18471
- Campbell, Gordon, 1874-1
- Canadian Northern Railway Company1
- Carleton, Henry1
- Cecilia, Saint--Drama1
- Charles--I,--King of England,--1600-1649.1
- Church of Jesus Christ of Latter-day Saints--Controversial literature1
- Clap, Jenny--Ownership1
- Clap, Jonathan--Ownership1
- Clymer, Joseph--Claims vs. United States1
- Coke, Jacynth d'Ewes Fitz-Ercald, 1879- 1
- Computer People for Peace1
- Connecticut Woman Suffrage Association1