▁of ▁his ▁brother ▁King ▁John ▁and ▁then ▁of ▁his ▁infant ▁son ▁King ▁Henry ▁III , ▁of ▁whose ▁household ▁he ▁became ▁ste ward . ▁In ▁the ▁capacity ▁of ▁House hold ▁Knight ▁he ▁acted ▁as ▁part ▁of ▁the ▁back bone ▁of ▁the ▁king ' s ▁army , ▁as ▁a ▁temporary ▁cast ellan , ▁sh er iff , ▁diplom at ▁and ▁general ▁trouble - sh oot er . ▁He ▁thus ▁served ▁as ▁Const able ▁of ▁Sher bor ne ▁Castle , ▁and ▁Governor ▁of ▁Cor fe ▁Castle , ▁both ▁in ▁Dor set . ▁He ▁under to ok ▁an ▁important ▁diplom atic ▁assignment ▁in ▁ 1 2 2 0 ▁to ▁recover ▁Princess ▁Joan , ▁infant ▁sister ▁of ▁Henry ▁III , ▁from ▁the ▁court ▁of ▁Hugh ▁X ▁of ▁L us ign an ▁to ▁whom ▁she ▁had ▁been ▁bet ro th ed ▁and ▁by ▁whom ▁then ▁rejected . ▁Russell ▁died ▁in ▁ 1 2 2 4 . ▁He ▁married ▁Rose ▁B ard olph , ▁da . ▁of ▁Thomas ▁B ard olph ▁and ▁wid ow ▁of ▁Henry ▁de ▁Pom ero y , ▁fe ud al ▁baron ▁of ▁the ▁large ▁bar ony ▁of ▁Ber ry ▁Pom ero y ▁in ▁Dev on , ▁consisting ▁of ▁ 3 2 ▁kn ight ' s ▁fe es . ▁The ▁marriage ▁to ▁this ▁wid ow ▁of ▁a ▁ten ant - in - ch ief ▁was ▁likely ▁to ▁have ▁been ▁a ▁reward ▁from ▁the ▁king ▁for ▁Russell ' s ▁services , ▁and ▁brought ▁Russell ▁a ▁life - inter est ▁in ▁her ▁large ▁d ower ▁lands . ▁John ▁Russell