Markov's papers consist of correspondence, a brief biography (apparently by his nephew), and printed materials. Correspondence in this collection consists of letters to a nephew named Seva. Printed materials include issues of "Mirovai︠a︡ Sluzhba" (1936-38), and two books by Markov: "Voĭny temnykh sil" (Paris, 1928), and "Otrechennye dni fevralśkoĭ revoli︠u︡t︠s︡ii 1917 goda" (Harbin, 1938).