The collection includes more than 100 letters to Benningsen from P.P. Ignatév, the last Minister of Imperial Russia, written in 1920-1921; and correspondence between Benningsen and his wife, Ekaterina Platonovna Benningsen, and Ksenii︠a︡ V. Denikina. Several manuscripts by E. P. Benningsen are also included: a long memoir which treats the history of the Benningsen family, his own government and Red Cross service, the 1917 Revolution and the Civil War, and emigration in France and Brazil. There are copies of his lectures and articles on historical topics; a lengthy essay on the character of modern politics called "Ce que la vie m'a enseigne"̀; and a number of reviews of books dealing with Russia. There are two sets of subject files: one containing materials relating to the activities of the "Soi︠u︡z Pazheĭ" (an emigre organization of former members of the Corps of Pages); the other, materials relating to the efforts by former officers of the Kavalergardskiĭ Regiment to recover a trove of silver objects belonging to them that they had deposited in the State Treasury at the beginning of World War I and which finally ended up in Belgrade. A brief biographical note on her husband by Ekaterina P. Benningsen and a few photographs complete the collection.

Correspondence, manuscripts, documents, photographs, subject files and printed materials of Zolotarev. The correspondence includes letters from Petr P. I︠U︡renev, Aleksandr I. Konovalov, and Geroid T. Robinson. There are photographs of two actors from the Moscow Art Theater: Vasiliĭ Luzhskiĭ and Ivan Moskvin. The correspondence dates from 1879 to 1950 and includes some miscellaneous items apparently unrelated to Zolotarev. There are manuscripts by various authors on religious and political themes. The subject files include materials relating to several Russian emigre organizations, the White Navy, and Columbia University. Among the printed materials are booklets, journals, clippings and posters.

There are letters from fellow historians, such as John Franklin Jameson and Aleksandr Lappo-Danilevskiĭ; Kadet Party leaders, including Vladimir D. Nabokov and Nikolaĭ Astrov; and others such as Boris Bakhmeteff, Charles Crane, Vladimir Jabotinsky, Louis Marshall, Thomas Masaryk, and Nikolaĭ Roerich. A large correspondence series consists of letters and petitions sent to Miliukov during the Third State Duma (1907-12). Manuscripts include Mili︠u︡kov's memoirs, and his notebooks from the period of the Civil War. There is also a manuscript by Isaak Shkovskiĭ (pseudonym -- Dioneo) on Russian writers and journalists during World War I. Subject files deal with the State Duma, the Civil War, and the emigration.

The papers consist primarily of letters from Kravchinskiĭ to his wife, Fanni; these are in a numbered sequence, which does not appear to be fully chronological, and some are incomplete. There are also 3 items from Petr Kropotkin and 1 from Eduard Bernstein, and other correspondence. There is a manuscript by Kravchinskiĭ in memory of Mykhaĭlo Drahomaniv, and photographs of Kravchinskiĭ and of his wife.

Correspondence, manuscripts, photographs, and printed materials of General Aleksiei Alekseevich Brusilov and his wife Nadezhda Vladimirovna. The correspondence is largely copies of their letters from 1914-1918 and her correspondence after his death. The manuscripts include part of his memoirs and several of her minor manuscripts, including an incomplete memoir. There are family photographs as well as photographs of Brusilov in military dress. Printed materials relate to Brusilov's career in the Imperial and Red armies and his rehabilitation by the Soviets in the Khrushchev era.

Manuscripts and photographs of Boris Georgievich Berg. There is an unpublished biography by B. G. Berg of Fedor Fedorovich Berg, "Feld́marshal Graf F. F. Berg i ego sovreminniki." The memoirs of B. G. Berg cover his youth, theatre career, World War I and its aftermath, and the emigration in France and the United States. There are also photographs of members of the Berg family.

Manuscripts and subject files of Vladimir N. Timchenko-Ruban. Timchenko-Ruban's memoirs"Stranit︠s︡y proshlago" discusses his childhood, his service in the Preobrazhenskiĭ Regiment, World War I, the 1917 Revolution and Civil War, and his life in France from 1922 and through the period of German occupation during World War II. Timchenko-Ruban's essay "1683-1958" concerns the history of the Preobrazhenskiĭ Regiment. There are two subject files containing documents inherited by Timchenko-Ruban. One file relates to Sofi︠́a︡ Danilova and contains school and Red Cross documents while the other relates to Semen Lazarev and his wife Olǵa (nʹee Mikhaĭlova) and contains school, travel and military documents. The documents in both files primarily date from the 1880-1920 period.

Photographs of various people and on various topics. There are a number of major groups: late 19th century Russian revolutionaries; the wreck of Alexander III's train in 1888; Russian families in the early 20th century; nurses in Petrograd in World War I (Kononova); Aleksandr Kerenskiĭ at the front, 1917; St. Tikhon's Monastery in Pennsylvania; and American cultural and political figures in the USSR in the 1950's (such as Van Cliburn, W.A. Harriman, Richard Nixon, Carl Sandburg, and Isaac Stern).

Papers include I︠U︡rév's memoirs"Polkovnik", accompanied by photographs and songs and poems which he wrote; Russian, German and Latvian personal documents; and a two-page memoir by his wife.

Papers include personal and professional correspondence, documents, manuscripts, photographs, drawings, printed materials. Most of the collection consists of Al'tschuler's personal and professional papers and letters from colleagues, patients and friends. Materials of the collection deal with professional affairs, revolution and civil war in Crimea, Al'tschuller's sanatorium in Yalta, emigration to Constantinople, Germany, Yugoslavia, Bulgaria, Czechoslovakia, activity of such organizations as Russkii zagranichnyi istoricheskii arkhiv and Vserossiiskii zemskii soiuz.