After Diaghilev's death, the Ballets Russes went bankrupt. To earn money, Balanchine began to stage dances for Charles B. Cochran's revues and Sir Oswald Stoll's variety shows in London. He was retained by the Royal Danish Ballet in Copenhagen as a guest ballet master. Among his new works for the company were "Danses Concertantes", a pure dance piece to music by Stravinsky, and "Night Shadow", revived under the title "La Sonnambula", the haunting tale of a poet who falls in love with a mysterious and alluring sleepwalker.