“Norman Kelley, a tenor who sang with the New York City Opera, the Metropolitan Opera and many other companies around the world, died last Monday in Rockland, Mass. … He made his Metropolitan Opera debut in 1957 as Mime in the ‘Ring’ cycle, but his longest-lasting legacy at that house may have been his English translation of Humperdinck’s ‘Hansel and Gretel,’ first performed in 1967 and used for decades thereafter.”