The collection consists of manuscripts, documents, correspondence, and printed materials.

The collection consists of diaries, documents, a map of the Zmievskiĭ uezd of the Kharkov region, and printed materials. Diaries by Onopko cover the Civil War period from March 13, 1920 to March 25, 1922, and span from his service in the Kharkov area to his emigration to Prague. The diaries also concern Onopko's years in emigration in France from 1930-1944. Documents are mostly from the Civil War period. Printed materials consist of a clipping and printed drawing.

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 of correspondence, manuscripts, documents, subject files, newspaper clippings, printed materials, photographs, and drawings. Most of the correspondence concerns Bilyi's activities as Ataman, and the journal "Kazak"; other correspondence is personal or relates to the activities of anti-Communist groups (such as the Anti-Bolshevik Bloc of Nations - ABN). The manuscripts include articles, reminiscences, drafts of appeals and proclamations, and speeches mostly concerning the Cossack movement, Cossack history, and the anti-Communist movement. The documents mostly concern KNOD and related organizations for the period ca.1955-1970; a few relate to the Cossacks in 1919-1945. The subject files contain newspaper clippings, printed materials, notes, and correspondence relating to KNOD, ABN, "Kazak", Ukrainian-Cossack relations, and the Vlasov Movement. The newspaper clippings are mostly from Russian and Ukrainian emigre publications. Printed materials include a set of "Kazak" and ephemera of KNOD, ABN, and similar organizations. There are a few photographs showing Bilyi in Cossack dress and also various Cossack emigre organization activities. The paintings and drawings include portraits of Bilyi and his wife, Tatiana Iurievna Bilyi, in national dress (his Cossack, hers Czech), other Cossack leaders, Cossack heraldry, and a map of "Cossackia."

The diaries discuss the Revolution and the emigration in Harbin, China. Also included are genealogies of her family and a pencil sketch of a woman.

The collection includes letters of an autobiographical nature; memoirs concerning the Civil War and emigration, the largest part of them entitled "Ot Gallipoli do Brazilii"; copies of photographs and drawings from the Civil War and the Russian emigre fascist movement in the 1930's; and one issue of Russkaia Gazeta (Saõ Paulo, 1935), edited by Dakhov. Oversized materials: One folder, front fold of Russkaia Gazeta, January 26, 1935.