NAPOLEON I (1769-1821), Emperor of the French. Letter signed ('Napoleon') to Christian VII, King of Denmark, Paris, 20 February 1808, congratulating him on the birth of a granddaughter [Princess Vilhelmine Marie], one page, 4to, integral address leaf (minor discolouration, seal tear); with similar letters of courtesy to Frederick VI, King of Denmark, signed by Joseph Bonaparte as King of Naples and Sicily, 10 May 1808 (split through at centre fold), Louis Bonaparte as King of Holland, 22 September 1808, and Joachim Murat as King of Naples, 19 January 1811. (4)