Derivis, Henri-Etienne (2 August 1780, Albi; 1 February 1856, Livry), vocalist, entered the Conservatoire in 1799 and made his debut at the Opéra on 11 February 1803 as Zarastro in Les Mystères d’Isis. Derivis possessed a powerful bass voice and an effective presence on the stage, and he moved to the leadership of the bass section of the Opéra without dispute. He went on to sing nearly every bass role at the theatre between 1805 and 1828. After his debut Derivis was given the opportunity to…