'Louis-Nicolas Davout, Duke of Auerst?dt, Prince of Eckm?hl', c1800, (1896). Louis-Nicolas d'Avout (1770-1823), better known as Davout, 1st Duke of Auerstaedt, 1st Prince of Eckm?hl, was a French general who was Marshal of the Empire during the Napoleonic era. Engraving after the portrait by Tito Marzocchi, after Claude Gautherot. From Life of Napoleon Bonaparte, Volume II, by William Milligan Sloane. [The Century Co., Macmillan & Co., Limited, New York & London, 1896]