 These elements include paintings coming to life ("Ages Ago", used again in "Ruddigore"), a deaf nursemaid binding a respectable man's son to a "pirate" instead of to a "pilot" by mistake ("Our Island Home", 1870, reused in "The Pirates of Penzance"), and the forceful mature lady who is "an acquired taste" ("Eyes and No Eyes", 1875, reused in "The Mikado").During this time, Gilbert perfected the 'topsy-turvy' style that he had been developing in his Bab Ballads, where the humour was derived by setting up a ridiculous premise and working out its logical consequences, however absurd.Mike Leigh describes the "Gilbertian" style as follows