NAPOLEON III (1808-1873). P.S. "Napoléon Louis B" with 2 autograph lines, London April 8, 1840; 2pages in-4 (small split repaired). Certified copy of the contract signed on June 25, 1839 by Prince Napoléon Louis Bonaparte, residing in London, with the Parisian lawyer Mauguin, for the latter's sale to the Prince of the newspaper Le Commerce, for the sum of 470,000F.