Collection
- Charles I, King of England Papers, 16421
- Charles K. Gardner Papers, 1835-18601
- Clove Branch Railroad Company Records, 1869-18931
- Cora Eastman Papers, 1877-18861
- D. Ayers Blakeslee Papers, 1861-18671
- Daniel Hawks Papers, 1930-19511
- Daniel Tomlinson Papers, 18421
- David M. Clark Papers, 1804-18121
- Delmar Progress Club Records, 1902-20211
- Dolores I. Carrara Papers, 19461
- Dorothy L. Sweeney Papers, 1941-20041
- Duxbury and Cohasset Railroad Company Records, 1871-18721
- E. Melton Miller Papers, 1904-19101
- E.C.M. Rand Papers, 19091
- East Freetown, New York, Railroad Freight Records, 1891-19011
- Ebenezer Fitch Papers, 1812-18461
- Edward E. Lane Records, 1889-18901
- Edward H. Benedict Papers, 1832-18531
- Edwin Adams et al v. William Rockefeller Records, 1889-19211
- Edwin Robert Van Kleeck Papers, 1946-19651