Papers consist of manuscripts and printed materials. Manuscripts include a typescript memoir by Gagarin about Simferopol in 1917-18, two brief essays by Gagarin on the rivers Neva and Volga, and a typed copy of a letter from a soldier in World War I to a nurse. Printed materials include scattered issues of and clippings from "Russkoe Slovo" one issue of "Sei︠a︡teĺ" two issues of "Chasovoĭ" three issues of "Russkiĭ Invalid" and twenty-one issues of "Osvedomitel ́Leĭb-Egereĭ" and a copy of "Epizody proshlogo. Rasskazy iz zhizni avtora i izbrannye stikhotvorenii︠a︡" (Buenos Aires, 1972), a collection of poems and brief memoiristic essays, manuscripts of some which are among Gagarin's papers.

The collection consists primarily of manuscripts and clippings of articles and stories Bel'deninov wrote in the 1950s and 1960s and published in such emigre periodicals as "Russkii Put'", "Nashe Vremia" and "Rossiia". Several memoirs by Bel'deninov touch on such topics as his education in Irkutsk and St. Petersburg, his legal practice before and during the revolutionary period, and the Civil War in Siberia.