LAS CASES, Emmanuel Augustin Dien donne Mann Joseph, MARQUIS, fm-min-oo-E1 o-giis-tan cle-e-don-na ma-ran zhO-zef las kis, French historian, one of the companions of Napoleon at Saint Helena: b. Chateau Las Cases, near Revel, 1766; d. Passy-sur-Seine, 15 May 1842. He was educated at the school of the Oratorians in Vendome, and at the military and naval schools of Paris, and when the Revo lution broke out took part with the Royalists.
After the defeat of the Prussians in Champagne he fled to London, where he lived as a teacher. While here he executed his 'Atlas historique et geographique) (1802), which he published under the name of Le Sage. When the Emigres were recalled by Napoleon, Las Cases returned to Paris. Having entered the army of Bernadotte (1809) he gained the favor of Napoleon, who in 1810 made him chamberlain and count of the empire. After the disasters of Leipzig and Moscow, Las Cases commanded N the 10th legion of the ational Guard. In 1814 he refused to assent to the request for Napo leon's abdication, and went to England, whence he subsequently sent in his adhesion to the Bourbons. After the return from Elba he went
back to France, and after the final defeat of the emperor at Waterloo followed him to Saint Helena. Here with his son he devoted himself to the care of Napoleon, and passed his evenings in recording the emperor's re marks, which were subsequently published in his 'Memorial' de Sainte Hiline) (1822-23). Having written a letter to Lucien Bonaparte commenting •freely on the treatment to which Napoleon was subjected, he was arrested, 25 Nov. 1816, sent to the Cape of Good Hope, presently taken to England, thence conveyed to the Continent and to Frankfort-on-the-Main, where he at last received his liberty after 13 months' captivity. He was not allowed to re turn to France until the death of Napoleon. In the reign of Louis Philippe he was elected in 1831 and 1839 to the Chamber of Deputies, taking his seat at the extreme left, or with the ultra-opposition. He wrote, in addition to the works above mentioned, his own life, (Mernoires d'E. A. D., Comte de Las Cases' (1818).