Gilbert and Sullivan ancestor and the device of the ghostly ancestors stepping out of their portraits. When "Ruddigore" closed, no new opera was ready. Gilbert again proposed a version of the "lozenge" plot for their next opera, and Sullivan reiterated his reluctance to set it. While the two men worked out their artistic differences, and Sullivan finished other obligations, Carte produced revivals of such old favourites as "H.M.S. Pinafore", "The Pirates of Penzance", and "The Mikado". "The Yeomen of the Guard" (1888), their only joint work with a serious ending, concerns a pair of strolling players—a jester and a singing girl—who are caught
The Mountebanks work was released in 2018. The story of the opera revolves around a magic potion that transforms those who drink it into whoever, or whatever, they pretend to be. The idea was clearly important to Gilbert, as he repeatedly urged his famous collaborator, Arthur Sullivan, to set this story, or a similar one, to music. For example, he had written a treatment of the opera in 1884, which Sullivan rejected, both because of the story's mechanical contrivance, and because they had already produced an opera concerning a magic potion, "The Sorcerer" (1877); Sullivan felt that the story lacked "human emotion".