▁the ▁W izard ▁of ▁O z , ▁the ▁Emer ald ▁City ▁Co ach man , ▁and ▁the ▁Guard ). ▁When ▁Dor othy , ▁T oto , ▁Sc are c row , ▁T in ▁Man , ▁and ▁Cow ard ly ▁Lion ▁reach ▁the ▁Emer ald ▁City , ▁they ▁ring ▁on ▁the ▁bell ▁which ▁alert ed ▁the ▁Gate keeper . ▁When ▁he ▁not ices ▁that ▁there ▁is ▁no ▁sign ▁near ▁the ▁bell ▁and ▁puts ▁it ▁up ▁before ▁closing ▁the ▁door ' s ▁window ▁where ▁it ▁says ▁" B ell ▁out ▁of ▁order . ▁Please ▁knock ." ▁They ▁knock ▁which ▁ple ases ▁the ▁Gate keeper ▁and ▁were ▁able ▁to ▁persu ade ▁him ▁into ▁letting ▁them ▁go ▁to ▁the ▁W izard ▁by ▁showing ▁the ▁Ruby ▁S li ppers ▁that ▁Dor othy ▁has . ▁The ▁Gate keeper ▁lets ▁them ▁into ▁the ▁Emer ald ▁City . ▁ ▁In ▁The ▁Mu ppets ' ▁W izard ▁of ▁O z , ▁Sam ▁the ▁E agle ▁port ray s ▁" the ▁Gate ▁Guard ." ▁ ▁In ▁The ▁W iz ▁Live !, ▁Common ▁port ray s ▁" The ▁B oun cer ▁/ ▁The ▁Gate keeper ▁Of ▁The ▁En tr ance ▁To ▁The ▁Emer ald ▁City ." ▁ ▁J ell ia ▁J amb ▁ ▁J ell ia ▁J amb , ▁a ka ▁the ▁" pre tty ▁green ▁girl ", ▁is ▁the ▁head ▁ma id ▁of ▁the ▁Emer ald ▁City ' s ▁royal ▁palace . ▁She ▁first ▁appears ▁in ▁The ▁Wonder ful ▁W izard ▁of ▁O z ▁( 1 9 0 0 ) ▁and ▁is ▁first