Sandra Warfield performed with the Zurich Opera, where in 1961 she sang Katerina in the world premiere of Martinů's "The Greek Passion". They returned to the United States, and the Metropolitan Opera, in the 1960s. Her performances at the Met included Ulrica in Giuseppe Verdi's "Un ballo in maschera", Berta in "The Barber of Seville" by Gioachino Rossini, Marcellina in "The Marriage of Figaro", Maddalena in "Rigoletto" by Verdi and Erda in Richard Wagner's "Siegfried", totaling 172 performances. She sang the role of Delilah in "Samson and Delilah", with Richard Tucker performing as Samson. In her farewell performance in January 1972, Warfield
The Lady of the Lake (poem) Nation".) But, the Fiery cross or "Crann Tara" was a device for rallying people in Scotland and did not carry racist connotations. Gioachino Rossini composed an opera, "La Donna del Lago", based on the poem. The opera downplays the other plots in favor of the love story. In the opera, James Douglas tells Ellen that she must marry Roderick Dhu. Some of the characters' names are changed slightly: Roderick Dhu becomes Rodrigo, Ellen becomes Elena, and James Fitz-James becomes Uberto. Walter Scott's poem, in the German translation by Adam Storck, was set to music by Franz Schubert in his work