Marguerite Long
Having studied in the Conservatoire in Nice from 1932 to 1935, where he again won first prize, François came to the attention of Alfred Cortot, who encouraged him to move to Paris and study with Yvonne Lefébure at the École Normale de Musique. He also studied piano with Cortot (who reportedly found him almost impossible to teach), and harmony with Nadia Boulanger. In 1938, he moved to the Paris Conservatoire to study with Marguerite Long, the doyenne of French teachers of the age. He won the piano section of the inaugural (1943) Marguerite Long-Jacques Thibaud Competition.