His first serious publication was the
History of Louis XI, which is dry and epigrammatical in style but displays considerable powers of research and impartiality. The reputation of Duclos as an author was confirmed by the publication of his
Considérations sur les mœurs de ce siècle (1751), a work justly praised by
La Harpe as containing a great deal of sound and ingenious reflection. It was translated into
English and
German. The ''Mémoires pour servir à l'histoire du dix-huitième siècle
, intended by the author as a sort of sequel to the preceding work, are much inferior in style and matter, and are, in reality, little better than a kind of romance. In consequence of his History of Louis XI'', he was appointed
historiographer of France, when that place became vacant on
Voltaire's retirement to
Prussia. His
Secret Memoirs of the Reigns of Louis XIV and Louis XV (for which he was able to utilize the
Mémoires of
Louis de Rouvroy, duc de Saint-Simon, suppressed in 1755), were not published until after the
French Revolution. A complete edition of the works of Duclos, including an unfinished autobiography, was published by Auger (1821). See also
Sainte-Beuve,
Causeries du lundi, t. ix.; René Kerviler, ''La Bretagne et l'Académie française du XVIIIe siècle
(1889); L. Mandon, De la valeur historique des mémoires secrets de Duclos'' (1872). ==References==