Jean Vadon (1887-1973) Studied with Guilmant and Vierne and was a professor at the Schola Cantorum as well as organist at a number of Parisian churches. This Easter toccata combines the melodies of O Filii and Haec Dies. Score available at: http://www.lulu.com/product/paperback/grand-choeur-and-toccata/1922600