ations ▁has ▁out standing ▁significance ▁as ▁a ▁rare , ▁partially ▁int act ▁conv ict ▁stock ade ▁and ▁road ▁side ▁site ▁una ffect ed ▁by ▁significant ▁development . ▁It ▁reflect s ▁the ▁cul min ation ▁of ▁Governor ▁Dar ling ' s ▁system atic ▁identification ▁of ▁road work ▁as ▁a ▁form ▁of ▁secondary ▁pun ishment . ▁Con struct ed ▁as ▁part ▁of ▁Thomas ▁Mitchell ' s ▁Great ▁South ▁Road ▁project , ▁the ▁stock ade ▁is ▁believed ▁to ▁have ▁held ▁the ▁largest ▁concentration ▁of ▁conv ict s ▁in ▁southern ▁NS W ▁during ▁its ▁operation ▁and ▁provides ▁insight ▁into ▁the ▁nature ▁of ▁conv ict ▁life ▁and ▁labour ▁and ▁early ▁road ▁building ▁in ▁NS W . ▁ ▁Tow r ang ▁Con v ict ▁Stock ade ▁was ▁listed ▁on ▁the ▁New ▁South ▁Wales ▁State ▁Heritage ▁Register ▁on ▁ 1 ▁February ▁ 2 0 1 3 ▁having ▁satisfied ▁the ▁following ▁criteria . ▁ ▁The ▁place ▁is ▁important ▁in ▁demonstr ating ▁the ▁course , ▁or ▁pattern , ▁of ▁cultural ▁or ▁natural ▁history ▁in ▁New ▁South ▁Wales . ▁ ▁The ▁Tow r ang ▁stock ade , ▁associated ▁sites ▁and ▁road ▁form ations ▁have ▁state ▁historical ▁significance ▁for ▁their ▁links ▁to ▁Governor ▁Dar ling ' s ▁" Gre at ▁Ro ads " ▁plan , ▁which ▁reflected ▁his ▁program ▁of ▁expansion ▁and ▁expl oration ▁in ▁the ▁col ony . ▁The ▁program ▁also ▁reflected ▁Dar ling ' s ▁understanding ▁of ▁the ▁links ▁between ▁a ▁good ▁road ▁system ▁and ▁economic ▁development . ▁The ▁sites ▁also ▁have ▁local ▁and ▁State ▁significance ▁for ▁their ▁part ▁in ▁the ▁development