accompanied by the following note: Despite Gilbert's disclaimer, audiences, critics and even the Prime Minister, Benjamin Disraeli, identified Sir Joseph Porter with W. H. Smith, a politician who had recently been appointed First Lord of the Admiralty despite having neither military nor nautical experience. Sullivan was delighted with the sketch, and Gilbert read a first draft of the plot to Carte in mid-January. Following the example of his mentor, T. W. Robertson, Gilbert strove to ensure that the costumes and sets were as realistic as possible. When preparing the sets for H.M.S. Pinafore, Gilbert and Sullivan visited Portsmouth in April 1878 to inspect ships. Gilbert made sketches of H.M.S. Victory and H.M.S. St Vincent and created a model set for the carpenters to work from. This was far from standard procedure in Victorian drama, in which naturalism was still a relatively new concept, and in which most authors had very little influence on how their plays and libretti were staged. This attention to detail was typical of Gilbert's stage management and would be repeated in all of his Savoy operas. Gilbert's focus on visual accuracy provided a "right-side-up for topsy-turvydom", that is, a realistic point of reference that serves to heighten the whimsicality and absurdity of the situations. Sullivan was "in the full swing" of work on the piece by the middle of April 1878. The bright and cheerful music of Pinafore was composed during a time when Sullivan suffered from excruciating pain from a kidney stone. The cast began music rehearsals on 24 April, and at the beginning of May 1878, the two collaborators worked closely together at Sullivan's flat to finalise the piece. In Pinafore, Gilbert, Sullivan and Carte used several of the principal cast members whom they had assembled for The Sorcerer. As Gilbert had suggested to Sullivan in December 1877, "Mrs. Cripps [Little Buttercup] will be a capital part for Everard ... Barrington will be a capital captain, and Grossmith a first-rate First Lord." However, Mrs Howard Paul, who had played Lady Sangazure in The Sorcerer, was declining vocally. She was under contract to play the role of Cousin Hebe in Pinafore. Gilbert made an effort to write an amusing part for her despite Sullivan's reluctance to use her, but by mid-May 1878, both Gilbert and Sullivan wanted her out of the cast; unhappy with the role, she left. With only a week to go before