DÉSORMIÈRE (Roger)]. Set of 45 letters addressed to Roger Désormière, mainly from fellow composers and conductors. - POULENC (Francis). Autograph note signed. June 17 [1950 or 1951]. - KOECHLIN (Charles Louis Eugène). 4 autograph letters signed, one of them in the hand of his wife.1949-1951.... 4 autograph letters signed, three of which are signed by a certain "Chip". 1949-1950.