Correspondence, manuscripts, photographs, a subject file, and printed materials collected by Ermolov. The collection almost exclusively concerns the 1917 Revolution and the Civil War. Correspondence includes items by Isabel Hapgood and Konstantin Nabokov. The manuscripts include English-language translations of Russian materials from the period. There are 2 photographs: 1 of Grigoriĭ Rasputin at a tea party in 1916, and the other of the State Duma in 1917. The subject file concerns the Orthodox Patriarch Tikhon in 1917-19. Printed materials include Russian, English, and American clippings, pamphlets, journals, posters, and fliers.