Sylvia, Act I. Sylvia's attendants: standing: Colleen Power, Penelope Hill, Patricia Kay, kneeling: Janice Illingworth, Margaret Duckitt, Veronica Paeper. Music: Le?o Delibes. Choreography and production: David Poole. Design: A. and J. Pritchard. Date of first performance: 29 September 1961.