▁of ▁the ▁Pop ▁Art ▁and ▁Op ▁Art ▁movements . ▁His ▁travel s ▁took ▁him , ▁among ▁other ▁places , ▁to ▁the ▁war ▁c emetery ▁in ▁Italy ▁where ▁his ▁brother ▁was ▁buried . ▁This ▁event , ▁and ▁the ▁politics ▁of ▁Europe ▁during ▁the ▁ 1 9 6 0 s , ▁had ▁a ▁prof ound ▁effect ▁on ▁Hot ere ’ s ▁work , ▁not ably ▁in ▁the ▁Sang ro ▁and ▁Pol aris ▁series ▁of ▁paint ings . ▁ ▁Return ▁to ▁New ▁Zealand ▁Hot ere ▁returned ▁to ▁New ▁Zealand ▁and ▁exhib ited ▁in ▁Dun ed in ▁in ▁ 1 9 6 5 , ▁and ▁returned ▁to ▁the ▁city ▁in ▁ 1 9 6 9 ▁when ▁he ▁became ▁the ▁University ▁of ▁O tag o ' s ▁Frances ▁H od g kins ▁Fellow . ▁At ▁about ▁that ▁time ▁he ▁began ▁to ▁introduce ▁literary ▁elements ▁to ▁his ▁work . ▁He ▁worked ▁with ▁po ets ▁such ▁as ▁H one ▁Tu wh are ▁and ▁Bill ▁Man hire ▁to ▁produce ▁several ▁strong ▁paint ings , ▁and ▁produced ▁other ▁works ▁specifically ▁for ▁the ▁New ▁Zealand ▁literary ▁journal ▁Land fall . ▁Hot ere ▁also ▁worked ▁in ▁collaboration ▁with ▁other ▁prominent ▁artists , ▁not ably ▁Bill ▁C ul bert . ▁▁ ▁From ▁the ▁ 1 9 7 0 s ▁on ward , ▁Hot ere ▁was ▁noted ▁for ▁his ▁use ▁of ▁unusual ▁tools ▁and ▁materials ▁in ▁creating ▁his ▁work , ▁not ably ▁the ▁use ▁of ▁power ▁tools ▁on ▁cor rug ated ▁iron ▁and ▁steel ▁within ▁the ▁context ▁of ▁two - dimensional ▁art . ▁ ▁Black ▁paint