Collection
- C. Harrison Mann, Jr. Map Collection, 1579/19611
- C. Harrison Mann, Jr. map collection, 1579/19611
- Cambridge University Charters, 1575/16692
- Channing Moore Hall Papers, 1920/1953, bulk 1930/19531
- Chester McNerney Collection, 1290/19502
- Christian S. Hutter miscellany, 1602/19455
- Collection of French Language Manuscripts, 1633/1942, bulk 1633/19421
- Collection of Spanish Language Manuscripts, 1551/18581