The Slavic mss., 1817-1947, consists of letters and documents of Russian and Czech political and literary figures, including Russian author Ivan Alekseevich Bunin, 1870-1953, and Czech politicians Tomáš Garrigue Masaryk, 1850-1937, and Jan Garrigue Masaryk, 1886-1948.
The Allen mss., 800-1972, consists of manuscript pieces collected by William Edward David Allen, 1901-1973, foreign service officer, businessman, and author, and his own writings about Georgian history.
The Amfiteatrov mss., 1890-1948, consists of the correspondence and writings of journalist and playwright Aleksandr Valentinovich Amfiteatrov, 1862-1938.
The Eastman, E. mss., 1923-1958, consists primarily of the correspondene and writings of Eliena Vassilyenva Krylenko Eastman, 1895-1956, artist, and Max Eastman, 1883-1969, author.