▁Paris , ▁D . es ▁l ▁( D . L it ), ▁producing ▁a ▁th esis ▁dealing ▁with ▁the ▁relation ▁of ▁the ▁Wel sh ▁story ▁of ▁Per ed ur ▁to ▁the ▁French ▁and ▁German ▁versions . ▁The ▁work ▁focused ▁on ▁the ▁influence ▁of ▁Wel sh ▁literature ▁and ▁tradition ▁on ▁French ▁Arthur ian ▁Roman ces . ▁With ▁an ▁extensive ▁knowledge ▁of ▁French , ▁Wel sh , ▁Med ieval ▁Wel sh , ▁German ▁language ▁and ▁Liter ature , ▁this ▁scholar ship ▁became ▁her ▁passion ▁and ▁sh aped ▁her ▁lif el ong ▁career . ▁▁ 1 9 1 2 - 1 3 ▁University ▁of ▁Manchester , ▁Ass istant ▁L ect urer ▁in ▁French . ▁▁ 1 9 1 3 - 1 8 ▁University ▁of ▁London , ▁King ’ s ▁College . ▁L ect urer ▁in ▁French ▁Language ▁and ▁Liter ature . ▁▁▁ 1 9 1 9 - 2 0 ▁University ▁of ▁London , ▁King ’ s ▁College . ▁Re ader ▁in ▁French ▁Language ▁and ▁Liter ature , ▁Re ader ▁in ▁Rom ance ▁Phil ology , ▁( Head ▁of ▁Department ▁ 1 9 2 0 ). ▁ ▁During ▁the ▁First ▁World ▁War , ▁Mary ▁Williams ▁also ▁held ▁numerous ▁respons ib ilities ▁in ▁addition ▁to ▁her ▁full - time ▁academic ▁post ▁at ▁King ' s ▁College . ▁She ▁taught ▁French ▁and ▁German ▁at ▁London ▁schools , ▁delivered ▁lect ures ▁for ▁students ▁reading ▁for ▁the ▁new ▁degree ▁in ▁Com merce ▁in ▁the ▁University ▁of ▁London , ▁and ▁read ▁with ▁students ▁prepar ing ▁for ▁the ▁Hon ours ▁B . Sc