▁III ' s ▁military ▁campaign s ▁in ▁England ▁and ▁on ▁contin ental ▁Europe . ▁ ▁Car uc age ▁was ▁an ▁attempt ▁to ▁secure ▁new ▁sources ▁of ▁re venue ▁in ▁order ▁to ▁supp lement ▁and ▁increase ▁royal ▁income ▁in ▁a ▁time ▁when ▁new ▁dem ands ▁were ▁being ▁made ▁on ▁royal ▁fin ances . ▁Although ▁derived ▁from ▁the ▁older ▁dan eg eld , ▁car uc age ▁was ▁an ▁experiment ▁in ▁re venue ▁collection , ▁but ▁it ▁was ▁only ▁lev ied ▁for ▁specific ▁purposes , ▁rather ▁than ▁as ▁a ▁regularly ▁ass essed ▁tax . ▁Also ▁new ▁was ▁the ▁fact ▁later ▁collections ▁were ▁im posed ▁with ▁the ▁consent ▁of ▁the ▁bar ons . ▁However , ▁the ▁main ▁flow ▁of ▁royal ▁income ▁was ▁from ▁other ▁sources , ▁and ▁car uc age ▁was ▁not ▁collected ▁again ▁after ▁ 1 2 2 4 . ▁ ▁Background ▁ ▁In ▁medieval ▁England ▁there ▁was ▁no ▁clear ▁separation ▁between ▁the ▁king ' s ▁household ▁and ▁the ▁tre as ury . ▁The ▁main ▁sources ▁of ▁royal ▁income ▁were ▁the ▁royal ▁est ates , ▁fe ud al ▁rights ▁( such ▁as ▁fe ud al ▁a ids ▁or ▁fe ud al ▁relief s , ▁which ▁derived ▁from ▁the ▁king ' s ▁position ▁as ▁a ▁fe ud al ▁over l ord ), ▁tax ation , ▁and ▁fe es ▁and ▁other ▁prof its ▁from ▁the ▁jud icial ▁courts . ▁In ▁ 1 1 3 0 , ▁the ▁records ▁of ▁reven ues ▁paid ▁into ▁the ▁tre as ury ▁show ▁that ▁about ▁ 4 0 % ▁came ▁from ▁royal ▁est