L'incoronazione di Poppea
She made guest appearances at the Glyndebourne Festival, notably in 1953, as Gluck's "Alceste", in 1954, as Dorabella in "Così fan tutte", in 1962, as Poppea in Monteverdi's "L'incoronazione di Poppea". In 1954, she created the role of Cressida in William Walton's "Troilus and Cressida", at the Royal Opera House in London.