▁their ▁business ▁there . ▁ ▁To ▁give ▁loc als ▁time ▁to ▁make ▁alternative ▁arrang ements , ▁the ▁Rail ways ▁Department ▁agreed ▁to ▁retain ▁their ▁por ter ▁at ▁the ▁station ▁until ▁ 2 9 ▁September ▁ 1 9 2 7 ▁at ▁which ▁time ▁the ▁postal ▁office ▁closed . ▁ ▁Table t ▁equipment ▁was ▁retained ▁at ▁the ▁station ▁to ▁be ▁used ▁as ▁required . ▁ ▁Short ly ▁after ▁the ▁national isation ▁of ▁the ▁W MR ▁line , ▁the ▁Nap ier ▁Express ▁was ▁di vert ed ▁in ▁ 1 9 0 9 ▁from ▁the ▁W air ar apa ▁Line ▁to ▁run ▁through ▁the ▁Man aw atu ▁G orge ▁and ▁down ▁the ▁former ▁W MR ▁line ▁to ▁Well ington . ▁There after , ▁the ▁main ▁passenger ▁service ▁to ▁stop ▁at ▁Op aki ▁was ▁its ▁replacement , ▁the ▁W air ar apa ▁Mail . ▁A ▁new ▁passenger - only ▁service ▁was ▁provided ▁from ▁ 1 9 3 6 ▁with ▁the ▁introduction ▁of ▁the ▁W air ar apa - class ▁rail c ars , ▁which ▁supp lement ed ▁and ▁later ▁replaced ▁the ▁W air ar apa ▁Mail ▁in ▁ 1 9 4 8 . ▁The ▁W air ar apa ▁rail c ars ▁were ▁in ▁turn ▁replaced ▁after ▁the ▁opening ▁of ▁the ▁R im ut aka ▁T unnel ▁in ▁ 1 9 5 5 ▁by ▁the ▁tw in set ▁rail c ars . ▁The ▁rail car ▁tim et able ▁for ▁ 1 9 5 9 ▁shows ▁only ▁one ▁required ▁stop ▁at ▁Op aki ▁Monday ▁to ▁Saturday ▁on ▁a ▁morning ▁Wood