ISSERTIEUX, Diendonne Gabriel Yves (eess-err-tyuh), Comte d', French soldier, born in Plouharnel, Brittany, in 1753; died in Guiana in 1819. He served with distinction, as a volunteer, in the war of American independence from 1776 till the surrender of Yorktown in 1781, when he accompanied the Count of Saint Simon, who carried the news to Louis XVI. He served afterward in the body-guards, and, emigrating to the United States when the guards were dissolved in 1791, he opened a French school in New Orleans. When Napoleon was proclaimed emperor he returned to France and was appointed captain of artillery. He acted as adjutant to General Lagrange in the expedition to Dominica, taking part in the bombardment of Les Roseaux, the capital of the English colony, on 23-25 February, 1806, and was promoted major. He commanded a battalion in Cayenne in 1807, and protested when Governor Hugues surrendered the colony to the Portuguese in 1811. He remained a prisoner in Kingston, Jamaica, till 1814, when he was appointed lieutenant-colonel by Louis XVIII. and sent again to command in Guiana. He is the author of "La verite sur la capitulation du Gou-verneur Hugues" (Cayenne, 1819), and " Ndmoire a Sa Majeste l'Empereur sur la situation de Cayenne a l'epoque de la capitulation " (Paris, 1813).