s ▁La ▁fig lia ▁del ▁reg imento ▁ ▁Har le quin ▁C ock ▁Robin ▁and ▁Jen ny ▁W ren ▁( 1 8 6 7 ), ▁a ▁Christmas ▁p antom ime . ▁ ▁The ▁Mer ry ▁Z ing ara ▁( 1 8 6 8 ), ▁a ▁par ody ▁of ▁Michael ▁Bal fe ' s ▁The ▁Boh em ian ▁Girl ▁ ▁Robert ▁the ▁Dev il ▁( 1 8 6 8 ), ▁a ▁par ody ▁of ▁Meyer be er ' s ▁Robert ▁le ▁di able . ▁ ▁One ▁of ▁Gilbert ' s ▁most ▁successful ▁early ▁plays , ▁it ▁opened ▁the ▁G ai ety ▁Theatre , ▁London ▁and ▁ran ▁in ▁the ▁provinces ▁for ▁ 3 ▁years . ▁ ▁The ▁Pre tty ▁Dru id ess ▁( 1 8 6 9 ), ▁a ▁par ody ▁of ▁Norm a ▁– ▁the ▁last ▁of ▁Gilbert ' s ▁five ▁" oper atic ▁bur les ques " ▁ ▁An ▁Old ▁Sc ore ▁( 1 8 6 9 ) ▁( rew ritten ▁as ▁" Qu its !" ▁in ▁ 1 8 7 2 ) ▁Gilbert ' s ▁first ▁full - length ▁comedy . ▁ ▁The ▁Princess ▁( 1 8 7 0 ). ▁Musical ▁far ce ; ▁the ▁prec ursor ▁to ▁Princess ▁I da . ▁ ▁The ▁Palace ▁of ▁Tr uth ▁( 1 8 7 0 ). ▁The ▁first ▁of ▁Gilbert ' s ▁blank ▁verse ▁" F air y ▁Com ed ies ". ▁▁ ▁Cre atures ▁of ▁Imp ulse ▁( 1 8 7 1 ), ▁with ▁music ▁by ▁Alberto ▁R ande g ger , ▁based