Heggie’s brand-new song cycle, This Is My Beloved, got a tremendous performance from Gilfry (who sang the challenging 20-minute work without a score), accompanied by the composer at the piano and two other instrumentalists, violinist Andres Cardenes and cellist Anne Martindale Williams. Based on a book of erotically charged poems by Walter Benton (1907-76), the song cycle (like the book) traces the arc of a love affair from the first rush of joyous emotion to the lonely resignation of the end.