Head of navigation of the Potomac River
Relief shown by hachures. Depths shown by contours and soundings. Photocopy of ms. map. Oriented with north toward the upper left. Includes notes. LC copy originally printed on separate sheets, assembled to 1 sheet, thirded, mounted on cloth backing, accompanied by negative photocopy, and annotated in pencil: From negative transferred from War Department. Available also through the Library of Congress Web site as a...
United States. Army. Corps of Topographical Engineers - Graham, Campbell - Abert, S. T. (Silvanus Thayer)