The Lost Child is a reflective, elegiac concert aria that connects four important figures from three quite separate disciplines—the Swiss-American “natural scientist” Louis Agassiz (1807–73), the American poet Henry Wadsworth Longfellow (1807–82), the German-American composer Otto Dresel (1826–90), and the English diva and composer Clara Kathleen Rogers (1844–1931). Its collaborative creation was initiated by Longfellow, who wrote the poem as a birthday tribute to his friend Agassiz. He recruite...