View of mezzo-sopranos Shirley Verrett and Grace Bumbry in concert at the War Memorial Opera House in San Francisco, California. Label on back: "San Francisco Opera, War Memorial Opera House, San Francisco, CA 94102, Publicity Department, (415) 861-4008. Terence A. McEwen, General Director. Contact: Scott W. Heron, John Schauer, (415) 565-6431. Photo ident: Grace Bumbry/Shirley Verrett, Aug. 12, 1985. Internationally acclaimed divas Grace Bumbry (left) and Shirley Verrett joined forces for a duo-concert 8:30 p.m. Monday, Aug. 12, at the War Memorial Opera House. Hailed in similar concerts at London's Royal Opera House and New York's Carnegie Hall, Bumbry and Verrett's San Francisco performance featured duets and arias by Verdi, Cilea, Bellini, Ponchielli and Donizetti."