▁must ▁have ▁been ▁due ▁to ▁some ▁want ▁of ▁proper ▁management ▁of ▁the ▁engine ▁by ▁its ▁ins u fficient ly ▁experienced ▁driver . ▁The ▁locomot ive ▁shed ▁for eman ▁at ▁D und alk ▁was ▁critic ised ▁for ▁want ▁of ▁jud g ement ▁in ▁not ▁sending ▁a ▁more ▁experienced ▁driver ▁and ▁in ▁his ▁choice ▁of ▁engine . ▁The ▁ 2 - 4 - 0 ▁supplied ▁would ▁have ▁had ▁ins u fficient ▁marg ins ▁( even ▁when ▁ha uling ▁a ▁ 1 3 - ve h icle ▁exc urs ion ▁train ) ▁to ▁be ▁sure ▁of ▁maintain ing ▁a ▁safe ▁speed ▁over ▁the ▁more ▁on er ous ▁grad ients ▁farther ▁up ▁the ▁line . ▁For ▁a ▁ 1 5 - ve h icle ▁exc urs ion , ▁assistance ▁should ▁have ▁been ▁given ▁by ▁the ▁engine ▁of ▁the ▁regular ▁train . ▁ ▁Fail ure ▁to ▁provide ▁an ▁assist ing ▁engine ▁ ▁The ▁report ▁critic ised ▁the ▁over - conf idence ▁of ▁the ▁exc urs ion ▁engine ▁driver ▁as ▁to ▁the ▁capabilities ▁of ▁his ▁engine ▁and ▁reg rett ed ▁that ▁his ▁better ▁jud g ement ▁must ▁have ▁been ▁overcome ▁by ▁the ▁words ▁of ▁the ▁Arm agh ▁station ▁master . ▁The ▁chief ▁cl erk ▁came ▁in ▁for ▁further ▁criticism ▁for ▁not ▁having ▁pers isted ▁with ▁his ▁instructions ▁for ▁the ▁regular ▁train ▁engine ▁to ▁provide ▁assistance . ▁There ▁was ▁no ▁direct ▁criticism ▁of ▁the ▁station ▁master ; ▁either ▁for ▁having ▁increased ▁the ▁size ▁of ▁the ▁train , ▁or ▁for ▁persu ading ▁the ▁engine ▁driver ▁to ▁attempt ▁Arm agh ▁bank ▁without