NAPOLEON III (1808-1873). P.S. "Napoleon Louis B" with 2 autographed lines, London April 8, 1840; 2 pages in-4 (small crack repaired). Certified copy of the contract signed on June 25, 1839 by Prince Napoleon Louis Bonaparte, living in London, with the Parisian lawyer Mauguin, for the sale by the latter to the Prince of the newspaper Le Commerce, for the sum of 470.000 F.