Correspondence, manuscripts, documents, photographs, subject files and printed material of Russian émigré writer, journalist, and Kadet Party leader Ariadna Vladimirovna Tyrkova-Williams. The collection also contains material by her husband, Harold Williams, and her son, Arkadiĭ Borman.

Correspondence, manuscripts, documents, subject files and printed materials. The greater part of the collection concerns the period 1917-22, with a substantial amount of material on the Humanities Fund and Bakhmeteff's friendships with prominent Americans. Cataloged materials include 50 or more letters from John Spargo, Vasilii Maklakov, Ekaterina Kuskova, Frederic Coudert, Georgii L'vov and Michael Karpovich (the last largely concerning the Humanities Fund); there are also a few items by Louis Brandeis, John Foster Dulles, Samuel Gompers, Colonel Edward House, Charles Lindbergh, and Thomas Masaryk. Extensive files of arranged materials include hundreds of letters by Arkadii Zak (who headed the Russian Information Bureau in New York, 1917-22), items to and by Sergei Uget, and official telegrams from 1917-22. There are manuscripts in the collection by Bakhmeteff, Spargo, Uget and Sergei Prokopovich. Subject files chiefly cover the Civil War period, the Paris Peace Conference, the Humanities Fund and Soviet Russia in the early 1920s. Printed materials include pamphlets, journals and clippings. There are also bound reports by different departments of the Russian embassy and mission from 1917 through the 1920s. In addition, the collection contains an oil portrait of Bakhmeteff by the artist Nicolas Becker.

Correspondence, manuscripts, documents, photographs, subject files, printed materials, and memorabilia of historian George Vernadsky (Georgii Vladimirovich Vernadskii; 1887-1973). Most of the collection consists of his personal and professional papers, circa 1918-1973. Sizable groups of materials also concern members of his family, especially his wife Nina (1884-1971); his father, scientist Vladimir I. Vernadskii (1863-1945); his mother Nataliia E. Vernadskaia (1860-1943); and his sister Nina V. Toll' (1898-circa 1976).

These papers consist of correspondence, manuscripts, documents, and printed materials. Most of the correspondence concerns Florinsky's publications and editorial work. Among the correspondents are Boris Bakhmeteff, Michael Karpovich, Aleksandr Meyendorff, Bernard Pares, James T. Shotwell, and Dmitriĭ Svi︠a︡topolk-Mirskiĭ: there are one or two items each from John Dewey, Herbert Hoover, Edwin Seligman, and Harry S. Truman. Manuscripts by Florinsky include his "Russia: A Short History" and some minor articles and book reviews. Other manuscripts include a poem by Bernard Pares and a study by Sergeĭ Prokopovich of the Soviet five-year plan of 1946-50; there is also a photograph of Meyendorff. Documents concern Florinsky's career at Columbia and also include book contracts. Printed materials consist chiefly of reviews of his works and reviews he wrote of others' books.

Correspondence, manuscripts, lectures, lecture notes, and subject files of Russian-American historian Mikhail Mikhailovich Karpovich (1888-1959). Karpovich was an employee of the embassy of the Russian Provisional Government in Washington, D.C., Professor Emeritus of Russian History and Literature at Harvard University, and founding editor of Novyĭ zhurnal.