. ▁ ▁Fra ud ▁and ▁the ft ▁One ▁of ▁the ▁first ▁jobs ▁he ▁under to ok ▁when ▁he ▁was ▁appointed ▁water ▁commission er ▁was ▁to ▁prepare ▁maps ▁of ▁the ▁system ▁so ▁that ▁he ▁could ▁assess ▁their ▁condition ▁before ▁undert aking ▁their ▁maintenance . ▁He ▁says ▁that ▁many ▁had ▁been ▁neglect ed ▁and ▁were ▁not ▁working ▁at ▁their ▁full ▁capacity . ▁He ▁was ▁especially ▁concerned ▁by ▁di version ▁of ▁the ▁supply ▁by ▁un sc rup ul ous ▁far mers ▁and ▁tr ades men , ▁among ▁many ▁others . ▁They ▁would ▁insert ▁pip es ▁into ▁the ▁channel ▁of ▁the ▁aqu ed uct s ▁to ▁tap ▁the ▁supply . ▁He , ▁therefore , ▁made ▁a ▁ ▁met icul ous ▁survey ▁of ▁the ▁int ake ▁and ▁the ▁supply ▁of ▁each ▁line , ▁and ▁then ▁investig ated ▁the ▁dis cre pan cies . ▁Le ad ▁pipe ▁st amps ▁bearing ▁the ▁name ▁of ▁the ▁owner ▁were ▁also ▁used ▁to ▁prevent ▁such ▁water ▁the ft . ▁He ▁was ▁well ▁aware ▁of ▁the ▁sem inal ▁work ▁De ▁Arch itect ura ▁by ▁Vit ru vi us , ▁which ▁mentions ▁aqu ed uct ▁construction ▁and ▁maintenance ▁published ▁in ▁the ▁previous ▁century ; ▁Front inus ▁refers ▁to ▁the ▁possible ▁influence ▁of ▁Vit ru vi us ▁on ▁the ▁pl um bers . ▁ ▁Distribution ▁system ▁Distribution ▁of ▁the ▁water ▁dep ended ▁in ▁a ▁complex ▁way ▁on ▁its ▁height ▁entering ▁the ▁city , ▁the ▁quality ▁of ▁the ▁water , ▁and ▁its ▁rate ▁of ▁dis charge . ▁Thus , ▁poor - quality ▁water ▁would ▁be ▁sent ▁for