Suspense: The Search for Henri LeFevre

A man who has just finished writing a symphony hears the exact same symphony on the radio. He had just set down the last note on paper he was happy and weary and full of peace. There was a radio near the couch, he sat down and turned it on and felt great horror as he heard the music playing on the radio, the music that he had just set down on paper. Then as the music finished the announcer said, you have just been listening to eulogy for orchestra opus 42 by Henri Lefevre. But who was Henri Lefevre?