The records in S-1931 contain chronological files of the Under-Secretary-General for the Department of Economic and Social Affairs (DESA), Philippe de Seynes, dating from 1954 through 1971. De Seynes held the title of Under-Secretary for DESA until January 1968 when his title was changed to Under-Secretary-General to reflect the reorganization of the top echelon of the Secretariat as defined by General Assembly Resolution 2369 (XXII), 19 December 1967.