He wrote the libretto for the musical, "Orlando," in an American Repertory Theatre and American Stage premiere production at the Loeb Stage in Cambridge, Massachusetts. George Frederic Handel was composer. He wrote the libretto after the Orlando Furioso by Ariosto. Peter Sellars was director. Craig Smith was music director. Elaine Spatz-Rabinowitz was set designer. Rita Ryack was costume designer. James F. Ingalls was lighting designer. Robert Brustein was artistic director.