▁railway ▁system ▁and ▁at ▁the ▁nearby ▁Din or w ic ▁Qu ar ry . ▁The ▁F fest ini og ▁Railway ' s ▁example ▁had ▁shown ▁that ▁running ▁a ▁ 2   ft ▁gauge ▁line ▁for ▁several ▁miles ▁from ▁quar ry ▁to ▁sea ▁was ▁perfectly ▁feas ible , ▁and ▁that ▁company ' s ▁Charles ▁East on ▁Spo on er ▁was ▁retained ▁to ▁survey ▁and ▁map ▁possible ▁routes ▁to ▁the ▁port . ▁The ▁Pen rh yn ▁direct ors ▁saw ▁every ▁reason ▁not ▁to ▁follow ▁the ▁Pad arn ▁Railway ' s ▁example ▁and ▁build ▁a ▁main ▁line ▁built ▁to ▁a ▁gauge ▁of ▁ 4   ft , ▁joining ▁lines ▁in ▁its ▁quar ries ▁to ▁lines ▁in ▁its ▁dock ▁both ▁at ▁a ▁much ▁nar ro wer ▁gauge . ▁All ▁Pen rh yn ▁tracks ▁were ▁of ▁the ▁same ▁narrow ▁gauge , ▁so ▁no ▁cost ly ▁and ▁in efficient ▁internal ▁trans - ship ments ▁were ▁needed . ▁At ▁the ▁end ▁of ▁ 1 8 7 5 ▁the ▁first ▁" main line " ▁locomot ive ▁was ▁delivered ▁to ▁Port ▁Pen rh yn ▁and ▁moved ▁to ▁the ▁quar ry ▁work sh ops ▁at ▁Co ed ▁y ▁Par c . ▁The ▁rail road ▁was ▁converted ▁into ▁the ▁new ▁railway ▁in ▁five ▁stages ▁from ▁ 1 8 7 7 ▁to ▁ 1 8 7 8 . ▁ ▁Pen rh yn ▁Qu ar ry ▁Railway ▁( 1 8 7 8 – 1 9 6 2 ) ▁ ▁The ▁first ▁locomot ives ▁used ▁on ▁the ▁new ▁railway ▁were ▁three ▁De ▁W inton ' s ▁with