▁mill s ▁as ▁sp inners , ▁swe ep ers ▁and ▁do ff ers , ▁with ▁girls ▁usually ▁starting ▁as ▁sp inners ▁and ▁boys ▁as ▁do ff ers ▁and ▁swe ep ers . ▁When ▁the ▁b obb ins ▁on ▁the ▁spin ning ▁frames ▁were ▁full , ▁the ▁mach in ery ▁stopped . ▁The ▁do ff ers ▁would ▁sw arm ▁into ▁the ▁mill ▁and , ▁as ▁quickly ▁as ▁possible , ▁change ▁all ▁the ▁b obb ins , ▁after ▁which ▁the ▁mach in ery ▁would ▁be ▁restart ed ▁and ▁the ▁do ff ers ▁were ▁free ▁to ▁am use ▁themselves ▁until ▁the ▁next ▁change - over . ▁On ▁the ▁newer ▁and ▁t aller ▁frames , ▁the ▁do ff ers ▁often ▁had ▁to ▁clim b ▁to ▁reach ▁the ▁b obb ins . ▁ ▁Great ▁Britain ▁ ▁In ▁Lanc ash ire ▁the ▁do ff ing ▁boys ▁were ▁free ▁to ▁do ▁what ▁they ▁liked ▁once ▁they ▁had ▁completed ▁a ▁do ff ing , ▁as ▁long ▁as ▁they ▁stayed ▁within ▁ear shot ▁of ▁the ▁" th rost le ▁job ber ," ▁who ▁would ▁wh ist le ▁when ▁they ▁were ▁next ▁needed . ▁ ▁They ▁were ▁motiv ated ▁to ▁do ▁the ▁work ▁as ▁fast ▁as ▁possible , ▁since ▁this ▁gave ▁them ▁as ▁long ▁as ▁possible ▁to ▁play . ▁Between ▁ten ▁and ▁twelve ▁boys ▁could ▁handle ▁a ▁factory ▁with ▁about ▁ten ▁thousand ▁th rost le ▁sp ind les , ▁depending ▁on ▁the ▁amount ▁of ▁y arn ▁being ▁sp un . ▁The ▁do ff ers ▁were ▁usually ▁the ▁sons ▁of ▁poor ▁people , ▁and