▁and ▁he ir ▁of ▁Sir ▁Robert ▁Const able ▁( 4 ▁April ▁ 1 4 2 3 ▁– ▁ 2 3 ▁May ▁ 1 4 8 8 ) ▁of ▁Fl amb or ough , ▁York shire , ▁and ▁Ag nes ▁W ent worth ▁( d . ▁ 2 0 ▁April ▁ 1 4 9 6 ), ▁daughter ▁of ▁Roger ▁W ent worth ▁of ▁North ▁El ms all , ▁York shire , ▁by ▁Marg ery ▁le ▁Des pen cer . ▁ ▁According ▁to ▁Hor ro x , ▁the ▁Const ables ▁of ▁Fl amb or ough ▁were ▁follow ers ▁of ▁the ▁Per c ys . ▁Mar m adu ke ' s ▁father ▁was ▁in ▁the ▁service ▁of ▁King ▁Edward ▁IV ▁in ▁ 1 4 6 1 , ▁but ▁by ▁ 1 4 7 0 ▁both ▁Mar m adu ke ▁and ▁his ▁father ▁were ▁in ▁the ▁service ▁of ▁Henry ▁Per cy , ▁ 4 th ▁Earl ▁of ▁North umber land . ▁Mar m adu ke ▁campaign ed ▁with ▁the ▁Earl ▁in ▁Scotland ▁in ▁the ▁early ▁ 1 4 8 0 s , ▁and ▁North umber land ▁kn ight ed ▁him ▁at ▁Ber wick ▁in ▁August ▁ 1 4 8 1 . ▁Mar m adu ke ' s ▁ep it aph ▁states ▁that ▁he ▁had ▁been ▁with ▁Edward ▁IV ▁in ▁France ▁in ▁ 1 4 7 5 , ▁perhaps ▁under ▁North umber land . ▁ ▁By ▁December ▁ 1 4 8 3 ▁Const able ▁was ▁a ▁kn ight ▁of ▁the ▁body ▁to ▁King ▁Richard ▁III , ▁and ▁was