Composer: Malcolm Williamson (1931-2003) Format: Vocal Score Instrumentation: Orchestra Work: The Stone Wall (Cassation for Audience and Orchestra) (1971) Binding: Work Language: English ISMN: 9790570051151 Size: 8.5 x 11.0 inches Pages: 15 Description Williamson used the word cassation in the sense of a miniature opera including audience participation. He wrote ten such works, of varying complexity and duration. His primary intention was to teach children the mechanics of putting on an opera, and the idea for the pieces first came to Williamson while teaching his own children about music.