opera, and entertain very grave doubts as to my power of doing it.... You say that in a serious opera, you must more or less sacrifice yourself. I say that this is just what I have been doing in all our joint pieces, and, what is more, must continue to do in comic opera to make it successful." A series of increasingly acrimonious letters followed over the ensuing weeks, with Sullivan laying down new terms for the collaboration, and Gilbert insisting that he had always bent over backwards to comply with the composer's musical requirements. Gilbert tried to encourage his collaborator: Gilbert offered a compromise that Sullivan ultimately accepted – that the composer would write a light opera for the Savoy, and a grand opera (Ivanhoe) for a new theatre that Carte was constructing for that purpose. Sullivan's acceptance came with the proviso that "we are thoroughly agreed upon the subject." Gilbert suggested an opera based on a theatrical company, which Sullivan rejected (though a version of it would be resurrected in 1896 as The Grand Duke), but he accepted an idea "connected with Venice and Venetian life, and this seemed to me to hold out great chances of bright colour and taking music. Can you not develop this with something we can both go into with warmth and enthusiasm and thus give me a subject in which (like The Mikado and Patience) we can both be interested....?" Gilbert set to work on the new libretto by the early summer of 1889, and by the mid-summer Sullivan had started composing Act I. Gilbert provided Sullivan with alternative lyrics for many passages, allowing the composer to choose which ones he preferred. The long opening number (more than fifteen minutes of continuous music) was the librettist's idea, and it gave Sullivan the opportunity to establish the mood of the work through music. The costumes were designed by Percy Anderson and sets were by Hawes Craven, with choreography by Willie Warde. They worked all summer and autumn, with a successful opening on 7 December 1889. Press accounts were almost entirely favourable, and the opera enjoyed a run longer than any of their other joint works except for H.M.S. Pinafore, Patience and The Mikado. Sullivan's old collaborator on Cox and Box (and the editor of Punch), F. C. Burnand, wrote, "Magnificento! ... I envy you and W.S.G. being able to place a piece like