▁number ▁blocks ▁continuous , ▁and ▁in ▁some ▁cases ▁there ▁is ▁no ▁correlation ▁between ▁the ▁number ▁blocks ▁used ▁for ▁the ▁steam ▁and ▁dies el ▁locomot ives ▁of ▁the ▁same ▁class ▁letter . ▁In ▁addition , ▁some ▁classes ▁start ▁the ▁number ▁series ▁with ▁a ▁ 0 , ▁while ▁others ▁start ▁with ▁a ▁ 1 . ▁ ▁The ▁first ▁locomot ives ▁used ▁in ▁the ▁state ▁were ▁small ▁steam ▁locomot ives , ▁and ▁by ▁the ▁end ▁of ▁the ▁ 1 9 th ▁century ▁ 0 - 6 - 0 ▁tender ▁engines ▁were ▁used ▁on ▁goods , ▁and ▁ 4 - 4 - 0 ▁configurations ▁for ▁passenger ▁work ings . ▁The ▁majority ▁of ▁locomot ives ▁were ▁imported ▁from ▁Britain , ▁from ▁companies ▁such ▁as ▁Bey er , ▁Pe ac ock ▁and ▁Company , ▁Robert ▁Steph enson ▁and ▁Company , ▁R ▁& ▁W ▁Haw th orn ▁and ▁George ▁England ▁and ▁Co . ▁The ▁William st own ▁Work sh ops ▁also ▁built ▁locomot ives ▁locally , ▁as ▁did ▁the ▁Phoenix ▁Found ry ▁in ▁Ball ar at . ▁ ▁As ▁the ▁size ▁of ▁trains ▁increased , ▁so ▁did ▁the ▁locomot ives . ▁The ▁ 4 - 6 - 0 ▁wheel ▁arrangement ▁became ▁popular ▁for ▁passenger ▁and ▁mixed ▁traffic ▁work ▁with ▁the ▁D 3 ▁and ▁A 2 ▁classes , ▁and ▁the ▁ 2 - 8 - 0 ▁arrangement ▁on ▁goods ▁with ▁the ▁K , ▁J ▁and ▁C ▁classes ▁last ing ▁into ▁the ▁ 1 9 6 0 s . ▁These ▁were ▁then ▁followed ▁by ▁the ▁ 4 - 6 - 2 ▁S