The collection consists primarily of letters written to Gerua in the 1930s by other emigres who had formerly served as officers, such as Vladimir Kamenskiĭ and Vasiliĭ Gurko. There are also copies of letters by Gerua from the Far East at the time of the Russo-Japanese War. Also included are manuscripts by Gerua and by Nikolaĭ Rotshteĭn; sketches by Gerua of participants in the 1926 Zarubezhnyĭ Sʺezd (Congress Abroad) in Paris; and photographs.