Performing notes and errata for Cinq Méditations sur l'Apocalypse by Jean Langlais
Jean Langlais (1907–1991) was one of the best-known organist-composers of the twentieth century. He rightfully holds a place of prominence in the French school alongside his contemporary and friend, Olivier Messiaen. Langlais, who was blind from the age of two, studied organ first under André Marchal at the Institut National des Jeunes Aveugles (National Institute for Blind Children). Later, in the early 1930s, he studied organ with Marcel Dupré and composition with Paul Dukas at the Paris Conservatory.
Source: thediapason.com