▁in ▁Aqu ile ia , ▁Pel ag ians ▁were ▁received ▁into ▁church ▁commun ion ▁without ▁formal ▁rep udi ation ▁of ▁their ▁errors ; ▁he ▁cens ured ▁this ▁practice ▁and ▁directed ▁that ▁a ▁provincial ▁syn od ▁be ▁held ▁where ▁such ▁former ▁Pel ag ians ▁be ▁required ▁make ▁an ▁une qu iv ocal ▁ab j uration . ▁ ▁Man ich ae ans ▁fle eing ▁the ▁V and als ▁had ▁come ▁to ▁Rome ▁in ▁ 4 3 9 ▁and ▁secret ly ▁organized ▁there ; ▁Leo ▁learned ▁of ▁it ▁around ▁ 4 4 3 , ▁and ▁proceeded ▁against ▁them ▁by ▁holding ▁a ▁public ▁debate ▁with ▁their ▁represent atives , ▁burning ▁their ▁books ▁and ▁writing ▁letters ▁of ▁warning ▁to ▁the ▁Italian ▁b ish ops . ▁His ▁attitude ▁was ▁as ▁decided ▁against ▁the ▁Pr isc ill ian ists . ▁Bishop ▁Tur ib ius ▁of ▁Ast org a , ▁aston ished ▁at ▁the ▁spread ▁of ▁the ▁sect ▁in ▁Spain , ▁had ▁addressed ▁the ▁other ▁Spanish ▁b ish ops ▁on ▁the ▁subject , ▁sending ▁a ▁copy ▁of ▁his ▁letter ▁to ▁Leo , ▁who ▁took ▁the ▁opportunity ▁to ▁write ▁an ▁extended ▁treat ise ▁( 2 1 ▁July ▁ 4 4 7 ) ▁against ▁the ▁sect , ▁exam ining ▁its ▁false ▁teaching ▁in ▁detail ▁and ▁calling ▁for ▁a ▁Spanish ▁general ▁council ▁to ▁investigate ▁whether ▁it ▁had ▁any ▁ad her ents ▁in ▁the ▁epis cop ate . ▁ ▁From ▁a ▁past oral ▁perspective , ▁he ▁gal van ized ▁char itable ▁works ▁in ▁a ▁Rome ▁bes et ▁by ▁fam ines , ▁an ▁infl ux ▁of