Whakaotihia te rerenga e whai ake nei: Ko te Western Heights o Dover tētahi o ngā pā tino whakamiharo i Piritene. Kei roto i a raatau he raupapa kaha, nga tohu kaha me nga awaawa, i hangaia hei tiaki i te United Kingdom mai i te whakaekenga. I hangaia rātau hei whakarei ake i ngā parenga o nāianei, hei tiaki hoki i te tauranga matua o Dover mai i ngā whakaeke mai i te moana, i te whenua hoki. Tuatahi i hoatu earthworks i roto i te 1779 ki te
I te whakaekenga i whakaritea i taua tau, ko te whenua teitei i te hauauru o Dover, Ingarangi, e kiia nei ko Dover Western Heights, i tino kaha i te tau 1804 i te wa i whakahaua ai a Lieutenant-Colonel William Twiss ki te whakahou i nga parenga o mua. He waahanga tenei o te kaupapa whakakaha nui hei whakautu ki te whakaekenga a Napoleon ki te United Kingdom. Hei awhina i te nekehanga o nga hoia i waenga i te Castle Dover me nga paruru o te taone, i kii a Twiss mo te hanga i te Grand Shaft i roto i te toka: