- Walter McClintock Papers (WA MSS S-1175)4
- [Collection of 233 letters and envelopes] (OSBORN FC76 1/3)4
- A. J. Macdonald Writings on American Utopian Communities (GEN MSS 1394)3
- Archibald MacLeish Collection Addition (YCAL MSS 269)3
- Blanche Matthias papers (YCAL MSS 45)3
- Carl Van Vechten Papers (YCAL MSS 1050)3
- David Leavitt papers (YCAL MSS 724)3
- Ella Barksdale Brown Papers (JWJ MSS 41)3
- Eve Arnold papers (YCAL MSS 611)3
- Haymarket Affair collection (GEN MSS 516)3
- Henry Savage papers (OSB MSS 200)3
- James Welch papers (YCAL MSS 248)3
- Josephine Herbst papers (YCAL MSS 474)3
- Morris Tyler family collection of John James Audubon (GEN MSS 85)3
- Richard L. Purdy Collection of Thomas Hardy (GEN MSS 111)3
- Stephen Tennant papers (OSB MSS 187)3
- Stuart H. Patterson papers (WA MSS S-2612)3
- Yale Tocqueville Manuscripts (GEN MSS 982)3
- Alain Arias-Misson papers (GEN MSS 1514)2
- Alfred Sully papers (WA MSS S-1311)2
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