Chukchi,, Violinist, 1899. This collection consists of diverse materials belonging to Grigorii Nikolaevich Potanin (1835-1920) and Nikolai Mikhailovich Iadrintsev (1842-94), two prominent Siberian scholars, social and political activists, and leaders of the regional-studies movement. The materials include their correspondence with friends and social activists (eighty-five items), photographs from N. G. Potanins expedition to Mongolia in 1899 (seventeen items), and photographs from the journal of Nina Aleksandrovna Adrianova, who was the daughter of Aleksandr Vasilevich Adrianov, a specialist in regional studies (eight items).