Tenor singing Uldino in the New York City Opera Attila of 13 and 15 March 1981, per the operadis discography of Attila (http://www.operadis-opera-discography.org.uk/CLVEATTI.HTM), whose cast is taken from Martin L. Sokol, The New York City Opera - An American Adventure, pp.503-504. No James Clark was in findopera.