Legendary "Wizard of Menlo Park" and American Inventor THOMAS EDISON remarkable undated WWI vintage handwritten autograph draft note, in pencil, to U.S. Secretary of the Navy JOSEPHUS DANIELS regarding experiments to blacken and disable the periscopes of enemy submarines, boldly signed "E" at conclusion. Amazing insight into the emerging technology of war from America's greatest inventor, boldly advocating to "plug" the enemy "if they come up."