 Incidental music for the play was by Frederick Delius, and the ballet in the House-of-the-Moving Walls was created by Fokine.Also in the cast, Henry Ainley as Hassan, Isabel Jeans as Yasmin.Keen's U.S. theatre credits include "Man and Superman" in 1947 at the Alvin Theatre in New York, "The Enchanted" at the Lyceum Theatre in New York in 1950, "Romeo and Juliet" at the Broadhurst Theatre in New York in 1951, and "Much Ado About Nothing" at the Lunt-Fontanne Theatre, also in New York.