The collection includes Pli︠u︡shchevskiĭ-Pli︠u︡shchik's diaries for 1905-1909 (covering the Russo-Japanese War, and the 1905 Revolution) and 1914-1920 (covering World War I, the 1917 Russian Revolution and the Civil War). Among other manuscripts are a memorandum prepared by General Denikin's staff for the allied missions upon their arrival in Ekaterinodar (Nov. 1918) and Pli︠u︡shchevskiĭ-Pli︠u︡shchik's obituary of General Ivan Romanovskiĭ. There is also a photograph of Pli︠u︡shchevskiĭ-Pli︠u︡schik and Romanovskiĭ at Imperial Staff Headquarters in Mogilev in 1917.

Collection includes three chapters apparently from the manuscript of a book by Efremov on the causes of the Revolution of 1917 in Russia; memoranda, notes, and clippings on attempts made in the 1920s and 1930s to bring about a rapprochement between the Russian Orthodox, Catholic, and Anglican churches (these materials were prepared for the Carnegie Endowment, apparently in 1935-36); and a 1917 menu from a restaurant in Petrograd.

The collection consists of correspondence, manuscripts, memoranda, and printed materials. Correspondence, mostly from the Soi︠u︡z nat︠s︡ionalńogo osvobozhdenii︠a︡ (Union for National Liberation) and the Sovet obʺedinennoĭ russkoĭ molodezhi (Council of United Russian Youth), concerns the establishment of a united monarchist movement in the 1920s. Manuscripts and memoranda describe the state of the monarchist movement in the emigration. Printed materials consist of monarchist pamphlets and circulars, and also printed directives dated 1919 from the commander of the Prishibskai︠a︡ and Graderfelśkai︠a︡ volosts.

The collection includes correspondence, manuscripts by Melńikov and others, documents, photographs, subject files and printed materials. There is a cataloged letter from George Kennan. Correspondence consists primarily of letters from various members of the Don Cossacks in exile, including General A.P. Bogaevskiĭ, Melńikov, and General V.V. Naumenko. Manuscripts include Melńikov's typescript memoirs "Pochemu 'belye' na i︠u︡ge ne pobedili krasnykh?"(230 p.). Reports, by members of the Don government in exile, are on the economy of Southeast Russia. Photographs and documents concern the Don Cossacks. Subject files primarily cover the Don Cossacks during the Civil War in exile. They include several signed letters and memos by General Denikin dated 1920. The financial records of the Don government in exile cover the years 1921-1926. The bulk of the printed materials consists of issues No. 51-272 (1930-1939) of the journal "Volńoe kazachestvo," published in Prague and later in Paris. Among the printed materials there is also a pamphlet dated 1919 and entitled "Vremennoe polozhenie o grazhdanskom upravlenii v mestnosti︠a︡kh, nakhodi︠a︡schikhsi︠a︡ pod verkhovnym upravleniem glavnokomandui︠u︡schego vooruzhennymi silami na i︠u︡ge Rossii." The majority of the material in the collection concerns the Don Cossacks in emigration.