8 ▁to ▁ 1 5 , ▁who ▁worked ▁in ▁coal ▁mines . ▁These ▁boys ▁worked ▁under ground , ▁leading ▁horses ▁along ▁sub ter rane an ▁roads , ▁manip ulating ▁vent ilation ▁doors , ▁helping ▁min ers ▁cut ▁and ▁lift ▁tons ▁of ▁coal , ▁and ▁filling ▁w ag ons ▁with ▁fresh ly ▁m ined ▁coal . ▁▁ ▁Robert ▁Mc Int osh ▁is ▁an ▁employee ▁at ▁the ▁National ▁Archives ▁of ▁Canada . ▁ ▁See ▁also ▁Big ▁Co al : ▁The ▁D irty ▁Secret ▁Be hind ▁America ' s ▁Energy ▁Future ▁( 2 0 0 6 ) ▁[[ Co al ▁River ▁( book )| Co al ▁River ]] ▁( 2 0 0 8 ) ▁[[ K ing ▁Co al ▁( book )| K ing ▁Co al ]] ▁( 1 9 1 7 ) ▁Min ers ' ▁L ung : ▁A ▁History ▁of ▁D ust ▁D ise ase ▁in ▁British ▁Co al ▁M ining ▁( 2 0 0 7 ) ▁Mov ing ▁Mountains : ▁How ▁One ▁Woman ▁and ▁Her ▁Community ▁W on ▁Justice ▁From ▁Big ▁Co al ▁( 2 0 0 7 ) ▁ ▁References ▁ ▁Category : Book s ▁about ▁coal ▁Category : 2 0 0 0 ▁non - f iction ▁books ▁Category : Co al ▁min ing ▁Category : M ining ▁in ▁Canada ▁Category : Co al ▁in ▁Canada ▁Category : Child ▁labour ▁Category : Work s ▁about ▁min ing ▁Category : Can ad ian ▁non - f iction ▁books <0x0A> </s> ▁Lyn n ▁Fle well ing ▁( born ▁Lyn n ▁Elizabeth ▁Be a ul