Hotchkiss' geological map of Virginia and West Virginia
Relief shown by hachures. LC Civil War maps (2nd ed.), H219 Available also through the Library of Congress web site as raster image. Ink and watercolor annotations showing "The great Limestone valley" and the "Lower coal measures coking coals" and ink annotations showing radial distances from Buchanan. LC copy imperfect: Holes along fold line. In pencil on verso: 464.