Collection
- Richard Bailey Crandall typescript, 18641
- Robert Lackhove papers, 1915-1946 (majority within 1942-1945)1
- Robert Peel collection, 1822-1870 (majority within 1822-1842)1
- Rochester (Pa.) High School Freshman manuscript year books, 19121
- Royal L. Lewis journal and commonplace book, 1844-18471
- Russell A. Alger family papers, 1842-1975 (majority within 1863-1865, 1888-1945)1
- Russell-McCabe autograph album, 1759-19201
- Samuel Coates collection, 1772-[ca. 1809]1
- Samuel F. Smith collection, 1884-18951
- Samuel S. Inglee logbook and journal, 1852-18551
- Sarah R. Parry autograph book, 1837-18401
- Snell-Andrews family collection, 1852-19881
- Society of Friends Rules of Discipline and Commonplace Book, 1834-18981
- Stiles family papers, 1852-1932 (majority within 1870-1916)1
- T. C. Connor journal, 1825-1833 (majority within 1825-1826)1
- Tenney-Fitts papers, 1806-1925 (majority within 1821-1831, 1867-1917)1
- The Curtis guest book, 1895-1916 (majority within 1895-1906)1
- Theodore Leonard collection, 1824-18501
- Thomas Davenport collection, 1864-18671
- Thomas Delf letters, 1836-18371