- II, Nicholas, Emperor of Russia, 1868-1918 -- Correspondence
- Skinner, Roger -- Correspondence
- Authors, American -- 20th century -- Correspondence
- Psychoanalysts -- Europe -- Correspondence
- Thoreau, Henry David, 1817-1862 -- Correspondence
- Soldiers -- Wisconsin -- Correspondence
- Juliet (Fictitious character) -- Correspondence
- Lee, Harper -- Correspondence
- Galilei, Maria Celeste, 1600-1634 -- Correspondence
- Herndon, William Henry, 1818-1891 -- Correspondence
- Biologists -- Correspondence
- Authors, French -- 20th century -- Correspondence
- Ciaglia, Anthony -- Correspondence
- Political activists -- Correspondence
- Smith family -- Correspondence
- Proust, Marcel, 1871-1922 -- Correspondence
- Women poets, American -- 19th century -- Correspondence