Marcoux, Vanni (12 June 1877, Turin; 22 October 1962, Paris), vocalist, studied music at the university in his native city and at the Paris Conservatoire. He made his first appearance on the stage in 1899 as Frère Laurent of Roméo et Juliette in Bayonne. He moved on to Belgium and Holland via northern France and then crossed the Channel to sing at Covent Garden in 1905. A bass-baritone, Marcoux made his debut at the Paris Opéra on 23 September 1908 as Méphisto. This same year he sang the…