- Lowell, Robert, 1917-1977 -- Correspondence
- Anglicists -- Great Britain -- Correspondence
- Larsson, Stieg, 1954-2004 -- Correspondence
- Jackson, Shirley, 1916-1965 -- Correspondence
- Vonnegut, Kurt -- Correspondence
- Alexander, Boyd, 1873-1910 -- Correspondence
- Astrophysicists -- United States -- Correspondence
- Adams, John, 1735-1826 -- Correspondence
- Married people -- United States -- Correspondence
- Constable, John, 1776-1837 -- Correspondence
- Vanzetti, Bartolomeo, 1888-1927 -- Correspondence
- Naturalists -- Correspondence
- Drama teachers -- Correspondence
- Authors, American -- 20th century -- Correspondence
- Presidents -- United States -- Correspondence
- Soldiers -- United States -- Correspondence -- Drama
- Children -- United States -- Correspondence
- Knausgård, Karl Ove, 1968- -- Correspondence
- Presidents' spouses -- United States -- Correspondence
- Ganda, Martin -- Correspondence
- Lennon, John, 1940-1980 -- Correspondence -- Drama
- Sacco, Nicola, 1891-1927 -- Correspondence
- Authors, English -- 20th century -- Correspondence
- Anarchists -- United States -- Correspondence
- Temple, O., Olive, 1880-1936 -- Correspondence
- Hardwick, Elizabeth -- Correspondence
- Dark, Johnny, 1940- -- Correspondence
- Shepard, Sam, 1943-2017 -- Correspondence
- Tolkien, J. R. R., Tolkien, J. R. R., John Ronald Reuel, John Ronald Reuel, 1892-1973., 1892-1973 -- Correspondence
- Epicurus -- Correspondence
- Ruhl, Sarah, 1974- -- Correspondence
- Ornithologists -- United States -- Correspondence
- Dickinson, Emily, 1830-1886 -- Correspondence
- Poets, American -- 20th century -- Correspondence
- Olson, Charles, 1910-1970 -- Correspondence
- Women intellectuals -- United States -- Correspondence
- Ritvo, Max, 1990-2016 -- Correspondence
- Dramatists, American -- 20th century -- Correspondence
- Mothers and sons -- United States -- Correspondence
- Vanderbilt, Gloria, 1924-2019 -- Correspondence
- Women dramatists, American -- 20th century -- Correspondence
- United States -- History -- Revolution, 1775-1783 -- Correspondence -- Juvenile literature
- Authors, American -- 20th century -- Correspondence -- Drama
- Couples -- United States -- Correspondence
- Naturalists -- Great Britain -- Correspondence
- Mothers and daughters -- Correspondence
- Novelists, English -- 20th century -- Correspondence
- Animal painters -- United States -- Correspondence
- Tyson, Neil deGrasse -- Correspondence
- Fuertes, Louis Agassiz, 1874-1927 -- Correspondence