- Walt Whitman collection (YCAL MSS 202)253
- Bryher papers (GEN MSS 97)244
- Richard Henry Pratt papers (WA MSS S-1174)238
- Norton Nicholls papers (Osborn c467)235
- William Carlos Williams papers (YCAL MSS 116)229
- The Southern Review records (YCAL MSS 694)224
- Edwin J. Beinecke Collection of Robert Louis Stevenson (GEN MSS 664)223
- Franz R. and Kathryn M. Stenzel collection of western American art (WA MSS S-2368)195
- Ezra Stiles Papers (GEN MSS 1475)186
- H. D. Papers (YCAL MSS 24)186
- Eugene O'Neill papers (YCAL MSS 123)175
- Mina Loy papers (YCAL MSS 6)155
- Italian castle archive (GEN MSS 110)137
- Letters to Herbert Van Thal (GEN MSS 464)132
- Mabel Dodge Luhan papers (YCAL MSS 196)127
- Walter O. Evans collection of Frederick Douglass and Douglass Family papers (JWJ MSS 240)119
- American Historical Financial Documents Collection (GEN MSS 1081)118
- Jean Toomer papers (JWJ MSS 1)117
- Edmund Wilson papers (YCAL MSS 187)115
- Dial/Scofield Thayer papers (YCAL MSS 34)111