▁a ▁native ▁land ▁purchase ▁officer ▁in ▁ 1 9 1 8 , ▁working ▁in ▁the ▁Haw ke ' s ▁Bay ▁and ▁Wang an ui ▁areas . ▁The ▁following ▁year , ▁he ▁became ▁commission er ▁and ▁a ▁land ▁court ▁judge ▁in ▁the ▁Tar an aki - W ang an ui ▁area . ▁In ▁ 1 9 2 4 ▁he ▁moved ▁to ▁be ▁land ▁court ▁judge ▁in ▁North ▁A uck land , ▁where ▁he ▁remained ▁until ▁ 1 9 4 3 . ▁ ▁Major ▁cases ▁A ches on ▁was ▁involved ▁with ▁included ▁whether ▁the ▁land ▁court ▁could ▁recogn ise ▁M ā ori ▁claims ▁to ▁the ▁for esh ore , ▁and ▁whether ▁the ▁Tre aty ▁of ▁Wait ang i ▁had ▁legal ▁weight . ▁Lake ▁Tang on ge , ▁Lake ▁O map ere ▁and ▁O ra ke i ▁were ▁land ▁disput es ▁he ▁played ▁a ▁significant ▁role ▁in . ▁ ▁In ▁ 1 9 2 5 ▁A ches on ▁proposed ▁the ▁Tok er au ▁District ▁Ma ori ▁Land ▁Board , ▁of ▁which ▁he ▁was ▁president , ▁fund ▁a ▁da ir ying ▁scheme ▁at ▁Te ▁K ao . ▁He ▁believed ▁this ▁scheme ▁would ▁assist ▁North land ▁M ā ori ▁to ▁develop ▁their ▁remaining ▁lands ▁and ▁am el ior ate ▁the ▁pover ty ▁of ▁the ▁area . ▁Although ▁the ▁ 1 9 3 4 ▁commission ▁of ▁inqu iry ▁into ▁the ▁Native ▁Affairs ▁Department ▁administration ▁supported ▁his ▁work , ▁the ▁ 1 9 3 5 ▁Labour ▁Government ▁increased ▁official ▁super vision ▁of ▁the ▁scheme . ▁A ches on ▁considered ▁this