Papers include Kagan's correspondence, photographs, printed materials and audio tapes. All letters in the collection date from 1938-39, when he had moved his Petropolis operations to Brussels; there are items by Vladislav Khodasevich, Vladimir Nabokov, and Mikhail Osorgin, and others. Among the photographs are pictures of Ivan Bunin, Konstantin Fedin, and Evgeniĭ Zami︠a︡tin. Printed materials consist chiefly of books published by his firms; some of the books are inscribed, for example by Nikolaĭ Berdi︠a︡ev and Lev Karsavin. Included is a lengthy taped interview of Kagan by Marc Raeff in which Kagan discuses his life and publishing activities.

This bound manuscript "Adol'f Lazarev: Zhizn' i Poznanie" begins with an introduction by Nikolaĭ Berdi︠a︡ev, and then presents copies of articles by Lazarev on such topics as the philosophy of William James and on Lev Shestov. There are also copies of several letters exchanged by Lazarev and Shestov in the period 1926-1936. The name of the compiler of this manuscript is not given.

The papers include correspondence, manuscripts, notes, and printed materials. Among the correspondents are Sergeĭ Bulgakov, Nikolaĭ Losskiĭ, and Marina T︠S︡vetaeva, and there are one or two letters each from Nina Berberova, Georgiĭ Florovskiĭ, and Semen Frank. There is substantial family correspondence, primarily letters from Fedotov to his wife and daughter. Manuscripts include articles and lectures by Fedotov, and a draft of his translation of the Book of Psalms into Russian; there is also a poem by Marina T︠S︡vetaeva, "M.V." (1932). Printed material consists of off-prints of many of Fedotov's articles. There are subject files on Nikolaĭ Berdi︠a︡ev and on the Bogoslovskiĭ Institute conflict in the late 1930s.

Collection of letters to Nikolaĭ A. Berdi︠a︡ev. The correspondents include a number of important emigre figures in the fields of literature, philosophy, and theology. The collection is useful for the study of emigre contributions in these areas, and also the emigration in France, Germany, and Czechoslovakia, particularly in the 1920s and 1930s.

Correspondence, manuscripts, notes, documents, photographs and printed materials of Frank. The collection reflects almost every aspect of his career, but especially his life in Germany, France, and England after his expulsion from Russia in 1922. Among the correspondents are Nikolaĭ Berdi︠a︡ev, Sergeĭ Bulgakov, Albert Einstein, Georgiĭ Florovskiĭ, Nikolaĭ Losskiĭ, Fedor Stepun, and Petr Struve; there are one or two items each from Vi︠a︡cheslav Ivanov, Bernard Pares, and Alekseĭ Remizov. There are also many letters from Semen Frank and his wife Tati︠a︡na to their son Viktor, and from Peter Struve's family to the Franks. Manuscripts for several of Frank's books are in the collection, such as "Svet vo tḿe" "Realńost ́i chelovek" and "Biografii︠a︡ P.B. Struve." Other manuscript materials by Frank include essays and lectures, outlines of courses he taught as a professor in Russia before his expulsion, and notebooks. There are also two poems by Vi︠a︡cheslav Ivanov. Among the printed works are Frank's Bible and offprints of his articles. There are photographs of Sergeĭ Bulgakov, Fedor Stepun, and of the Frank and Struve families.

The papers consist of correspondence, manuscripts, notes, documents, photographs, subject files, and printed materials. Among the correspondents are Louis Marin, Mikhail Osorgin, Alekseĭ Remizov, Boris Ubegaun, George Vernadsky, and the "Eurasianists" Petr Savitskiĭ and Petr Suvchinskiĭ; there is one letter from Nikolaĭ Marr. There is the manuscript of Nikitin's memoirs, "Arabeski: pochemu i︠a︡ stal vostochnikom?" There are extensive notes of lectures by Nikolaĭ Berdi︠a︡ev in 1925. Numerous photographs date from Nikitin's service in Iran. Subject files concern the Eurasian movement (evraziĭstvo), and the Committee "For Return to the Homeland" ("Za Vozvrashchenie na Rodinu"). Printed materials largely consist of Nikitin's own writings.

Correspondence, manuscripts, documents, photographs, subject files, and printed materials of members of the Zernov family, especially Nikolaĭ M. Zernov. Correspondence includes letters from Nikolaĭ Berdi︠a︡ev, Archimandrite Kiprian, Alekseĭ Remizov, Vasiliĭ Zenḱovskiĭ, and copies of many letters from Gustave Kullmann to his wife Marii︠a︡, nʹee Zernova. Manuscripts include: memoirs by Sofii︠a︡ A. Zernova about her childhood, youth, and family; Sofii︠a︡ M. Zernova's albums, poems, diaries and memoirs about the Civil War and the emigration in Europe; manuscripts by Nikolaĭ Zernov on religious and literary themes; a report by a Lt. Shokotov on his White Army detached service in 1917-1919; a brief manuscript by Vladimir M. Zernov claiming that syphillis was a contributing factor in Lenin's death; and manuscripts and speeches by Kullmann. Subject files include biographical information collected by Nikolaĭ Zernov on many emigre Orthodox churchmen and religious writers, and materials relating to Kullmann and the Zernov family.