- 17th and 18th century British periodicals, 1600/18001
- Bevill Family Papers, 1558/1939, bulk 1558/17071
- Blow Family Papers, 1613/1960, bulk 1770/18751
- C. Harrison Mann, Jr. Map Collection, 1579/19611
- C. Harrison Mann, Jr. map collection, 1579/19611
- Cambridge University Charters, 1575/16691
- Cantabrigiensis Comitatus Cambridgeshire (Reproduction), 16481
- Cantium Vernacule Kent (Reproduction), 16481
- Cestria Comitatus Palatinus (Reproduction), 16481
- Chester McNerney Collection, 1290/19501
- Christian S. Hutter miscellany, 1602/19451
- Collection of French Language Manuscripts, 1633/1942, bulk 1633/19421
- Collection of Spanish Language Manuscripts, 1551/18581
- Comitatus Nottinghamiensis (Reproduction), 16481
- Cornubia Cornwallia (Reproduction), 16481