Gilbert and Sullivan and "Ruddigore", which were less successful than the seven other operas from "H.M.S. Pinafore" to "The Gondoliers", Sullivan asked to leave the partnership, saying that he found Gilbert's plots repetitive and that the operas were not artistically satisfying to him. While the two artists worked out their differences, Carte kept the Savoy open with revivals of their earlier works. On each occasion, after a few months' pause, Gilbert responded with a libretto that met Sullivan's objections, and the partnership was able to continue successfully. In April 1890, however, during the run of "The Gondoliers", Gilbert challenged Carte over the expenses
Gilbert and Sullivan de Corneville"). Hundreds of unauthorised, or "pirated", productions of "Pinafore" appeared in America. During the run of "Pinafore", Richard D'Oyly Carte split up with his former investors. The disgruntled former partners, who had invested in the production with no return, staged a public fracas, sending a group of thugs to seize the scenery during a performance. Stagehands successfully managed to ward off their backstage attackers. This event cleared the way for Carte, Gilbert and Sullivan to form the D'Oyly Carte Opera Company, which then produced all of their succeeding operas. The libretto of "H.M.S. Pinafore" relied on stock character types,