Born at Chantilly; served in the Seven Years' War; attended in the antechamber in the palace when Louis XV. lay dying; was one of the first to emigrate on the fall of the Bastille; seized every opportunity to save the monarchy; was declared a traitor to the country, and had his estates confiscated for threatening to restore Louis XVI.; organised troops to aid in the Restoration; settled at Malmesbury, in England, during the Empire; returned to France with Louis XVIII. (1736-1818).