Relief shown by shading. Also shows primary administrative divisions. "Ispravlena po 1e apri︠e︡li︠a︡ 1868." In Russian. Ferro and Pulkovo meridians. Available also through the Library of Congress Web site as a raster image. Includes inset of Irkutsk. LC copy missing small edge sections, mounted on cloth backing, trimmed, rubber-stamped, annotated in pencil and ink, has annotated legend in French in lower margin.