Pieces from the late NUMBER@1 take up these techniques and tend towards experimental and a violent character - these include Revelation and Fall -LRB- based on a poem by PERSON@1 -RRB- , the music theatre pieces Eight Songs for a Mad King and PERSON@2 , and the opera PERSON@3 .

Pieces from the late NUMBER@1 combine these ideas with expressionism and a violent character , for example Eight Songs for a Mad King which is about King PERSON@4 .
