Nora Bonner Sandy Harris died on her way to dress rehearsal two days before the opera premiere. Most of the ensemble didn’t notice her absence. She was nine years old. The other children in the chorus whispered her name while mothers fitted their wig-caps and buttoned their long red robes. Her costume remained on the rack, stiff and heavy over satin slippers. Before long, the stagehand appeared, miscounted, and led them to the...