French poet, born at Nancy on the 26th of December 1716. He entered the army and, when Stanisław Leszczyński was established in 1737 as duke of Lorraine, he became an official at his court at Lunéville. He left the army after the Hanoverian campaign of 175657, and devoted himself to literature, producing a volume of descriptive verse, Les Saisons (1769), now never read, many articles for the Encyclopédie, and some miscellaneous works. He was admitted to the Academy in 1770. His fame, however, comes chiefly from his amours. He was already high in the favour of the marquise de Boufflers, Stanislauss mistress, whom he addressed in his verses as Doris and Thémire, when Voltaire in 1748 came to Lunéville with the marquise de Châtelet. Her infatuation for him and its fatal termination are known to all readers of the life of Voltaire. His subsequent liaison with Madame dHoudetot, Rousseaus Sophie, though hardly less disastrous to his rival, continued for the whole lives of himself and his mistress. Saint-Lamberts later years were given to philosophy. He published in 1798 the Principe des murs chez toutes les nations ou catéchisme universel, and published his uvres philosophiques (1803), two years before his death on the 9th of February 1803. Madame dHoudetot survived until the 28th of January 1813.