, ▁Bar ba uld ▁wrote ▁her ▁Ep ist le ▁to ▁William ▁Wil ber force ▁on ▁the ▁Re jection ▁of ▁the ▁Bill ▁for ▁Ab ol ishing ▁the ▁S lave ▁Trade ▁( 1 7 9 1 ). ▁In ▁it , ▁she ▁calls ▁Britain ▁to ▁account ▁for ▁the ▁sin ▁of ▁sla very . ▁She ▁condem ns ▁in ▁har sh ▁t ones ▁the ▁" av ar ice " ▁of ▁a ▁country ▁content ▁to ▁allow ▁its ▁wealth ▁and ▁prosper ity ▁to ▁be ▁supported ▁by ▁the ▁labour ▁of ▁ens la ved ▁human ▁be ings . ▁Moreover , ▁she ▁draw s ▁a ▁picture ▁of ▁the ▁plant ation ▁mist ress ▁and ▁master ▁that ▁reve als ▁all ▁of ▁the ▁fail ings ▁of ▁the ▁" colon ial ▁enter prise : ▁[ an ] ▁ind ol ent , ▁vol upt uous , ▁mon str ous ▁woman " ▁and ▁a ▁" de generate , ▁en fe e bled ▁man ". ▁ ▁In ▁ 1 7 9 3 , ▁when ▁the ▁British ▁government ▁called ▁on ▁the ▁nation ▁to ▁fast ▁in ▁honour ▁of ▁the ▁war , ▁anti - war ▁D issent ers ▁such ▁as ▁Bar ba uld ▁were ▁left ▁with ▁a ▁moral ▁quand ary : ▁" O bey ▁the ▁order ▁and ▁viol ate ▁their ▁cons ci ences ▁by ▁pray ing ▁for ▁success ▁in ▁a ▁war ▁they ▁disapp ro ved ? ▁observe ▁the ▁Fast , ▁but ▁pre ach ▁against ▁the ▁war ? ▁def y ▁the ▁Pro clam ation ▁and ▁refuse ▁to ▁take ▁any ▁part ▁in ▁the ▁Fast ?" ▁Bar ba uld ▁took ▁this ▁opportunity ▁to ▁write ▁a ▁ser