David Russell Hulme provides further evidence that the music of "The Zoo", or at least part of it, was already in existence before "Trial by Jury" opened. He notes that Sullivan's sketch manuscript for "Trial" contains the first sixteen bars of a solo for the Usher that was deleted before the opera's premiere, called "His Lordship's always quits". Aside from a key change, it is the same tune that Sullivan would use for Carboy's aria in "The Zoo", "I loved her fondly." But because Sullivan entered only a bit of the tune in his sketch, Hulme concluded that the composer "needed only a few notes to remind him of his intentions. (Nowhere else in the sketches do we find similar curtailment.) It is reasonable to suggest that he was able to do this because he intended drawing on ready-made material."