A specialist in international and corporate law and senior partner in the law firm of Sullivan & Cromwell, New York,ARTHUR H. DEAN was appointed by President Eisenhower as deputy to the Secretary of Slate with the rank of Ambassador, His was the difficult assignment of conducting the preliminary negotiations attempting to arrange the political conference envisaged by the Korean Armistice Agreement, and we have reason to be grateful for his firmness and long patience in that ordeal.