Relief shown by hachures. Shows Washington D.C. region, including western part of Maryland and northeastern Virginia. Does not show Pennsylvania with the exception of Gettysburg. Pen-and-ink on tracing cloth, mounted on paper. Holograph beneath title: "A.L. Rives., Col. & asst. to Chf. Eng." LC Civil War maps (2nd ed.), H15 Available also through the Library of Congress web site as raster image.