Collection
- Polly C. Bishop Mansfield collection, [ca. 1850s]2
- Practical and Medicinal Recipes manuscript, [1860s?]50
- Pöpplein & Brothers daybook and account ledger, 1806-18432
- Quaker collection, 1700-1888140
- R. A. L. Robinson atlas, 18312
- Rachel Ann White diary, 1834-18372
- Railroad Building in Québec Photograph Album, 1906-19092
- Rebecca M. Bradford letters, 1853-18572
- Rehoboth Beach, Mountain Island, Norfolk Photograph Album, ca. 1895-19052
- Revolutionary Cuba and Philippines collection, 1849-1925 (majority within 1895-1903)81
- Rewards of Merit Collection, ca. 1800-1900s (majority within 1830-1900)2
- Richard Crossley Civilian Conservation Corps Photograph Album, ca. 1938-19402
- Robert M. Vogel Collection of Historic Images of Engineering & Industry, ca. 1850s-2004 (majority within ca. 1850s-1900)1,144
- Robert Morgan letters, 1830-18432
- Robert W. McCleery papers, 1845-1863 (majority within 1862-1863)2
- Rochester (Pa.) High School Freshman manuscript year books, 19122
- Rogers Family Trip to China Photograph Album, ca. 19102
- Rosa Boyer notebook, 1881-18872
- Rowland Stephenson Scrapbook, ca. 1767-18402
- Rufus Degranza Pease papers, 1844-18906