This series consists of the Eli A. Popoff’s personal correspondence and his correspondence as a representative of the USCC which overlap on many occasions. These documents include correspondence with prominent Doukhobors, supporters of the Doukhobor cause in various countries, people interested in Doukhobor history and various organizations and departments of the Federal or Provincial governments. The correspondence is often accompanied by various materials, including writings, brochures, ephemera, promotional material, and clippings.