ys ▁( M rs . ▁Mill ard ), ▁Jan ette ▁( M rs . ▁J ett ), ▁and ▁Joe . ▁ ▁In ▁ 1 9 2 7 , ▁she ▁and ▁A . ▁P . ▁began ▁performing ▁as ▁the ▁Carter ▁Family , ▁perhaps ▁the ▁first ▁commercial ▁rural ▁country ▁music ▁group . ▁They ▁were ▁joined ▁by ▁her ▁cousin , ▁May b elle , ▁who ▁was ▁married ▁to ▁A . ▁P .' s ▁brother , ▁Ez ra ▁Carter . ▁Later , ▁S ara ▁married ▁Co y ▁Bay es , ▁A . ▁P .' s ▁first ▁cousin , ▁and ▁moved ▁to ▁California ▁in ▁ 1 9 4 3 , ▁and ▁the ▁original ▁group ▁dis band ed . ▁In ▁the ▁late ▁ 1 9 4 0 s , ▁May b elle ▁began ▁performing ▁with ▁her ▁daughters ▁Helen , ▁June , ▁and ▁An ita ▁as ▁The ▁Carter ▁Sister s ▁( the ▁act ▁was ▁renamed ▁The ▁Carter ▁Family ▁during ▁the ▁ 1 9 6 0 s ). ▁ ▁On ▁Carter ▁Family ▁record ings , ▁S ara ▁is ▁cred ited ▁as ▁author ▁of ▁the ▁songs ▁" F if ty ▁Mil es ▁of ▁El bow ▁Room " ▁and ▁" Ke ep ▁on ▁the ▁F iring ▁Line "; ▁in ▁truth ▁she ▁discovered ▁these ▁public ▁domain ▁songs ▁when ▁they ▁were ▁being ▁s ung ▁at ▁a ▁Se vent h - day ▁Advent ist ▁church ▁she ▁visited . ▁R CA ▁gave ▁her ▁song writer ▁credit , ▁as ▁it ▁did ▁A . P . ▁Carter ▁on ▁his ▁public ▁domain ▁discover ies . ▁The ▁Carter ▁family ▁record ings