Papers include correspondence, manuscripts, documents, photographs, subject files, and printed materials. The extensive correspondence relates to Mogilat's personal and professional activities and includes letters from many of her students and colleagues. Correspondents include Gleb Struve, Alexandra Tolstoy and Boris Unbegaun. Of special interest are letters by her first husband Baron von Taube, written from the front during World War I, and correspondence with various Russian acqaintances about the Soviet Union in the 1920s and 1930s in which they describe life in a communal apartment, and plans to rescue friends who have been arrested. Subject files concern Columbia's Russkiĭ Kruzhok and the Avtonomoff method of teaching Russian to Americans. There are letters, photographs, concert programs and music of Russian emigre composer and pianist Ariadna Mikeshina. Manuscripts are by various persons; most are by John Paul Mihaly, who had been Mogilat's student. There is also a manuscript of translations by Clarence Manning, "Four Poems by Blok." Documents and photographs concern Mogilat and her family, both before and after emigration. Printed materials consist mostly of off-prints of articles by Clarence Manning and others, primarily on literary topics. There are also books, mimeographed materials, periodicals, and clippings.

The collection consists of a small amount of correspondence (1942-1948) which revolves almost exclusively around Ernest Rope's efforts to teach Russian affairs at U.S. universities; one folder of personal documents, including letters of appointment, citations of merit, identity cards, and other items; manuscripts of articles and of a book length volume entitled "The Russia I have known;" and a diary, together with a photo-album, detailing his work in northern Russia and Estonia on behalf of the YMCA. The diary abounds with references to political and military events in northern Russia during the years 1919-1921.

Correspondence, manuscripts, subject files and printed materials of Eugen Loebl. Correspondence includes letters from prominent national figures such as William F. Buckley, Hubert Humphrey, Henry Kissinger and Harrison Salisbury. There are many manuscripts by Loebl from the 1970s and 1980s and subject files on economics, Czechoslovakia and East-West relations. Printed materials include clippings and short pieces by and about Loebl, and copies of four books by him.

The collection includes copies of official communiques sent and received by the Russian Imperial Embassy in London for the period 1886-1890 and 1919-1922; copies of reports forwarded by E.V. Sablin to the Council of Ambassadors in Paris, for the period 1922-1937; correspondence grouped around specific subjects; "case files" containing letters from and on behalf of individual Russian emigres wishing to enter Great Britain or to adjust their immigrant status; and letters received by E.V. Sablin and his wife Nadezhda Ivanovna from various persons, together with carbon copies of their replies. The most voluminous correspondence is between E.V. Sablin and V.A. Maklakov, V. Dobuzhinskiĭ, Joseph P. Kennedy, Aleksandr F. Kerenskiĭ, Vladimir V. Nabokov, Fedor I. Shali︠a︡pin, Petr and Gleb Struve, Adri︠a︡na V. Trykova-Williams etc. The remainder of the collection consists of manuscripts of articles and speeches both by Sablin and by others; public statements issued by Sablin in mimeograph form; miscellaneous mimeo material; clippings from both the Russian emigre press and British and French newspapers of articles by and about Sablin; as well as miscellaneous clippings, books, booklets, leaflets, performance programs, newsletters, Russian language newspapers published in England, photographs and several drawings and watercolor sketches.

The papers consist primarily of the Kosatkin-Rostovskiĭ's memoirs. His manuscript memoirs (150 p.) discuss his life up to 1906. Her typescript memoirs (440 p.) discuss her childhood, career as an actress in St. Petersburg, 1917-1918 in Petrograd, and the emigration in France. Also included are his diary for June-July 1940; a few letters written to him; clippings of his newspaper articles (many signed with the pseudonym "Antar"); and a book with his poetry and with essays dedicated to him; "Krestnym putem k voskresenii︠u︡" (Paris, 1948).

The collection contains correspondence, manuscripts, clippings, books and periodicals. There are two letters from Aleksandr Glazunov and one each from Aleksandr Grechaninov and Nikolaĭ Metner. The manuscripts deal with both cultural affairs and the Russian Revolution. Among the cultural topics are essays on music, Isadora Duncan, Maksim Gorḱiĭ and literary affairs. There are articles about general aspects of the Revolution and about such individuals as Lenin, Stalin, Chicherin, Dzerzhinskiĭ and Kamenev. Many of the articles are memoiristic in nature, particularly those about life in Moscow and in the provinces during the Revolution, Dzerzhinskiĭ and Kamenev. There are clippings of articles written by Sabaneev and a number of books and periodicals either written by Sabaneev or containing articles by him.

These papers, which concern mostly Kridl's years in the United States, consist of correspondence, manuscripts, documents, photographs, and printed materials. Among the correspondents are Oskar Kalecki, Roman Jakobson, Hans Kohn, Czesław Miłosz, Leszak Serafinowicz (Jan Lechoʹn), Kazimierz Wierzyʹnski, Jʹosef Wittlin, and Florian Zaniecki; there are one or two items each from Vladimir Nabokov, Harlow Shapley, and Antoni Slonimski. The manuscripts include lectures and articles by Kridl; there are also personal and family documents. There are about 100 photographs from Warsaw during the 1944 uprising and immediately after World War II. Printed materials include copies of books by Kridl.

The papers consist of correspondence, manuscripts, photographs, a subject file, and printed materials. The correspondence includes a letter from Randall Thomas Davidson, Archbishop of Canterbury, and one from Nikolaĭ Roerich. There is an essay about Metropolitan Platon by I︠O︡ann Chepelev, and a number of photographs depicting church officials and White army leaders. There is a subject file concerning Platon's meeting in 1919 with President Wilson. The collection also contains articles and clippings by and about the Metropolitan, and there are several books and pamphlets as well. The materials were collected by his daughter and grandson; many of the items are photocopies.

The collection contains correspondence from N. N. Evreinov, V. A. Maklakov, P. N. Shatilov, Petr Struve, and P. N. Vrangel'; manuscripts, primarily notes and drafts of articles; and photographs. Most of the collection consists of Chebyshev's articles from the period 1921-1936. These articles are on political, cultural, and human interest subjects. There are also books, booklets, and a scrapbook.