The collection consists primarily of correspondence and manuscripts. There are letters from Korneĭ Chukovskiĭ, Mikhail Karpovich, Andre Mazon, Vladimir Nabokov, and Evgeniĭ Zami︠a︡tin. There is also one item each from Sergeĭ Esenin, Pavel Mili︠u︡kov, Ivan Pavlov, and Nikolaĭ Roerich. Manuscripts include photocopies of poems by Korneĭ Chukovskiĭ, Sergeĭ Esenin, and Boris Pasternak. There are subject files on Dostoevskiĭ, Turgenev, Soviet education, and Slavic studies in the United Studies, and a photograph of Isaak Babel ́with his daughter.

The papers consist of correspondence, manuscripts, documents, subject files, photographs, a sound tape, and printed materials. There are many letters from Anton Kartashev; other correspondents include Mikhaĭl Karpovich, Philip Mosely, and Vasiliĭ Zenḱovskiĭ. There are manuscripts by Kartashev, Karpovich, and George Vernadsky, as well as by Novit︠s︡kiĭ himself on the Orthodox Church and the emigration. Subject files touch on his organizational activities. There are photographs of Novit︠s︡kiĭ with Dwight Eisenhower, Nelson Rockefeller, and Jacob Javits, and also of Zenḱovskiĭ. The sound tape is an interview with Novit︠s︡kiĭ on Voice of America about his father-in-law, Georgiĭ Shavelśkiĭ. Some of the materials concern Novit︠s︡kiĭ's brother, Evgeniĭ, and wife, Marii︠a︡.

The collection consists of correspondence, manuscripts, documents, a photograph, and printed material, primarily from the period 1941-1957. Included are letters from Ivan Bunin, Marc Chagall, Mikhail Karpovich, Vasiliĭ Maklakov, W. Somerset Maugham, Vladimir Nabokov, Ili︠́a︡ Repin, Edmund Wilson, Boris Zaĭt︠s︡ev and many others. Manuscripts of his works include "Istoki""Nachalo kont︠s︡a""Zhivi, kak khochesh"́, and "The Escape" (English translation of "Begstvo"), such shorter tales as "Noch ́v terminale""Povest ́o smerti", and "Ulḿskai︠a︡ noch"́, as well as numerous articles, book reviews and essays. There are financial records for "Novyĭ Zhurnal", which Aldanov helped found, and the clippings are mainly articles about Aldanov. There is one late photograph of Aldanov.

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.