The collection -- composed of correspondence, manuscripts, documents, photographs and printed materials -- sheds light on the anti-Bolshevik campaign in the Kuban ́region, Siberia and the Far East. The correspondence is chiefly from the early 1920s and includes letters from Viktor Pokrovskiĭ to his brother Boris. Among the manuscripts are biographical sketches of Viktor Pokrovskiĭ, especially accounts of his assassination in Bulgaria in 1922; information circulars sent out by Ataman Grigoriĭ Semenov, "Commander in Chief of the Far Eastern Armies;" and reports written by Boris Pokrovskiĭ on events in Europe, particularly Eastern Europe, and the Far East. The documents are comprised primarily of decrees (prigovory) from local Kuban ́Cossack groups and the photographs are chiefly portraits of Viktor Pokrovskiĭ. Included among the printed materials are clippings from the Russian and emigre press, a large number of Civil War broadsides and political pamphlets published in Siberia in 1919. Several of the latter are by and about Ataman Semenov.