Born at Rochefort-sur-Mer in 1867. Student of V d'Indy 1901-7. ("Déodat de Sévérac: la musique et les lettres", p.119, footnote.) A list of d'Indy students online gives his deathdate as 1914, but most other sites give 1942- none of them provide evidence one way or the other here. Besides the piano sonata published 1910 there is a violin sonata published by Demets in 1902, and one or two other things.