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
Pineapple Poll Offenbach, Strauss and Rossini music: "Gaîté Parisienne", "Le Beau Danube" and "La Boutique fantasque". He felt that a similar arrangement of the music of Sullivan would also be popular. He had to wait a decade until the copyright on Sullivan's music expired at the end of 1950. Meanwhile, Mackerras had moved to London, studied conducting in Prague and, in 1948, become assistant conductor and repetiteur for Sadler's Wells Opera. Peggy van Praagh suggested that he work out the idea with the young choreographer John Cranko. Cranko expanded the plot of W. S. Gilbert's Bab Ballad "The Bumboat Woman's Story", in