Portsmouth Rolling Stones, and Fleetingwood Mac. Numerous musical works are set in the city. "Portsmouth Point" is an overture for orchestra by the English composer William Walton in 1925. The work was inspired by Thomas Rowlandson's etching depicting Portsmouth Point, otherwise known as "Spice Island" in Old Portsmouth. The overture was used for the BBC Proms Concert in 2007. "H.M.S. Pinafore" is a comic opera in two acts set in Portsmouth Harbour, with music by Arthur Sullivan and libretto by W.S. Gilbert. John Cranko's 1951 ballet "Pineapple Poll", which features the operetta music of "The Bumboat Woman's Story" by Gilbert and
Ballet (music) of Tchaikovsky's "Swan Lake" after the composer's death. In many cases ballets were still short scenes within operas, to enable scenery or costume changes. Perhaps the best-known example of ballet music that is part of an opera is the "Dance of the Hours" from Amilcare Ponchielli's opera "La Gioconda" (1876). There was a violent change in mood when Igor Stravinsky's ballet "The Rite of Spring" (1913) was performed. The music was modernist and dissonant, and the movements were highly stylized. In 1924 George Antheil wrote "Ballet Mécanique," which was actually for a film of moving objects, not for dancers, but