- Moore, Marianne, 1887-1972 -- Correspondence
- Baker, Benjamin Webb, 1841-1909 -- Correspondence
- Holmes, Sherlock -- Correspondence -- Fiction
- Fletcher family -- Correspondence
- Tolkien, J. R. R., Tolkien, J. R. R., John Ronald Reuel, John Ronald Reuel, 1892-1973., 1892-1973 -- Correspondence
- Geer, George S. -- Correspondence
- Bonhoeffer, Dietrich, 1906-1945 -- Correspondence
- Women authors, American -- 20th century -- Correspondence
- Cash, Johnny -- Correspondence
- Russia -- Kings and rulers -- Correspondence
- Adult children -- Correspondence
- Dickinson, Emily, 1830-1886 -- Correspondence
- Poets, American -- 20th century -- Correspondence
- Authors -- Correspondence
- Cronkite, Walter -- Correspondence
- Couples -- United States -- Correspondence
- Biologists -- United States -- Correspondence
- Plath, Sylvia -- Correspondence
- Dunbar, Carl O., Carl Owen, 1891-1979 -- Correspondence
- African Americans -- Correspondence
- World War, 1939-1945 + Journalists -- Correspondence
- War correspondents -- United States -- Correspondence
- Naturalists -- United States -- Correspondence
- Churchill, Winston, 1874-1965 -- Correspondence
- Galilei, Maria Celeste, 1600-1634 -- Correspondence
- Churchill, Clementine, Lady, 1885-1977 -- Correspondence
- II, Nicholas, Emperor of Russia, 1868-1918 -- Correspondence
- Presidents' spouses -- United States -- Correspondence -- Fiction
- Women poets, American -- 20th century -- Correspondence
- Wilson, Edward O. -- Correspondence
- Novelists, American -- 20th century -- Correspondence
- Tolkien, J. R. R., John Ronald Reuel, 1892-1973 -- Correspondence
- Rhodes, Elisha Hunt, 1842-1917 -- Correspondence
- Novelists, English -- 19th century -- Correspondence
- Editors -- Correspondence
- Alcott, Louisa May, 1832-1888 -- Correspondence
- Adams, Abigail, 1744-1818 -- Correspondence
- Alifirenka, Caitlin -- Correspondence
- Le Carré, John, 1931-2020 -- Correspondence
- Wenner, Jann -- Correspondence
- Wilder, Laura Ingalls, 1867-1957 -- Correspondence
- Cronkite, Betsy, -2005 -- Correspondence
- Juliet (Fictitious character) -- Correspondence -- Drama
- Bradbury, Ray, 1920-2012 -- Correspondence
- Mitford family -- Correspondence
- Sexual minorities -- Correspondence