Scanned by
              John Osborne, Dickinson College
          Scan date
              Notes
              Sized, cropped, and prepared for use here by John Osborne, Dickinson College, January 25, 2013 
Image type
              map
          Courtesy of
              United States Military Academy
          Original caption
              Petersburg and Vicinity 1864 .. The Siege of Petersburg .. Hancock's Movements, 26-29 July and the Federal Plan of Attack Following the Explosion of the Mine, 30 July 1864 
          Source citation
              Gerald P. Stadler and Arthur V. Grant, Jr., Campaign Atlas of the American Civil War(West Point, NY: United States Military Academy, 1978), 54.