Chasseloup-Laubat. I. Francois de, marquis, a French soldier, born at St. Sernin, near Marennes, Aug. 18, 1754, died in Paris in October, 1833. Descended from a family of soldiers, he became one of the most skilful military engineers of his day. Declining to emigrate with his fellow noblemen, he rendered eminent service to the republic. He conducted the engineering operations at Maestricht in 1794, at Mentz in 1795, and in the Italian campaigns of 1796 and 1799. Charged shortly after with planning a new system of defensive operations, he strengthened the fortifications of Alessandria and made it the principal arsenal of the French, He planned the sieges of Colmar, Dantzic, and Stralsund, and was active in almost all the campaigns of Napoleon, including that of 1812 in Russia; after which he was appointed senator. During the hundred days he swore allegiance to Louis XVIII., who subsequently made him a marquis. As one of the judges of Marshal Ney, he was opposed to his execution. II. Justin Prudent de, count, and afterward marquis, son of the preceding, born in Paris in 18n2, died there, Dec. 17, 1803. He had attained the rank of brigadier general when the department of Seine-Inferieure returned him in 1849 to the legislative assembly, and Louis Napoleon rewarded him for his services by promoting him to be general of division in 1853 and grand officer of the legion of honor in 1859. III. Justin Napoleon Samuel Prosper de, marquis, brother of the preceding, born in Alessandria, Italy, during the French occupation of that city, March 29, 1805, died in Paris, March 31, 1873. He early entered the civil service, and in 1830 was sent as assistant commissioner to Algeria. In 1837 he was elected to the chamber of deputies, and subsequently became councillor of state.

In 1849 he was returned to the legislative assembly, and remained a member of the legislature during Louis Napoleon's administration, of which he was a stanch supporter; and in 1851 he was for a time minister of marine. In 1858 he became a member of the colonial board established in connection with the new ministry of Algeria and colonies, presiding over it during nearly the whole period of its existence (1859-'60); after which he had charge of the portfolio of marine and colonies, and was made a senator. He instituted important measures for the improvement of maritime and colonial affairs, and displayed much activity as president of the French geographical society, and as a contributor to the Revue des Deux Monties. In 1869 he officiated as minister, presiding over the council of state until the accession of Ollivier's administration, Jan. 2, 1870. His old constituents of Charente-Inferieure returned him to the national assembly in February, 1871. Called upon by that body to prepare a bill for the reorganization of the army, he submitted an important report on the subject in March, 1872.