Nivernois, Louis-Jules Mancini, Duke Of

, was born at Paris, Dec. 16, 1716. After he had served in the army some time, he was appointed ambassador to Rome, then to Berlin, and lastly, in 1763, was entrusted with the important negociation of the definitive treaty of peace at London, where he was highly respected, as a prudent and enlightened minister, who united amenity of manners with the dignity of his station. After his return to Paris, he devoted himself entirely to letters, and by some | publications he obtained an admission into the French academy, and that of inscriptions. This worthy and excellent man lived to be a sufferer from the revolution, and was committed to prison during the tyranny of Robespierre, in which he was forced to remain till 1796. He died Feb. 25, 1798, at the age of eighty-two. Of his works, his “Fables” have not been thought to preserve the reputation they had originally, when handed about in private. Many of them, however, equal any of the French productions of that class. An English translation, very ably executed, was published in 1799. The duke’s reflections on the genius of Horace, Boileau, and Rousseau, are highly esteemed; and his “Dialogues of the Dead,” “Moral Letters,” “Lives of the Troubadours,” &c. are distinguished proofs of an acute and well-cultivated mind. He was very conversant in English literature, and translated Pope’s “Essay on Man,” and Horace Walpole’s “Modern Gardening,” of which, in imitation of Walpole, he printed only a few copies for friends. Didot, while the author was alive, printed a fine edition of his works, in 1796, 8 vols. 8vo, the demand for which, according to Brunet, is not great. ¹