. ▁ ▁From ▁ 1 9 2 8 ▁until ▁his ▁ret irement ▁in ▁ 1 9 6 7 , ▁S ums ion ▁was ▁responsible ▁for ▁planning ▁and ▁serving ▁as ▁the ▁principal ▁conduct or ▁for ▁eleven ▁festiv als ▁held ▁at ▁Gl ouc ester . ▁ ▁Although ▁S ums ion ▁personally ▁acknowled ged ▁the ▁challenge ▁that ▁c athedral ▁organ ists — who ▁were ▁primarily ▁ch oral ▁conduct ors — fac ed ▁in ▁conduct ing ▁major ▁orch est ral ▁works , ▁his ▁own ▁conduct ing ▁was ▁greatly ▁respect ed , ▁and ▁his ▁interpret ations ▁of ▁El gar ' s ▁works ▁were ▁viewed ▁as ▁being ▁representative ▁of ▁the ▁composer ' s ▁own ▁read ings . ▁ ▁At ▁the ▁first ▁festival ▁following ▁El gar ' s ▁death ▁( 1 9 3 4 ), ▁S ums ion ▁proposed ▁that ▁the ▁three ▁c athedral ▁organ ists ▁each ▁conduct ▁one ▁of ▁the ▁El gar ▁works ▁on ▁the ▁program , ▁a ▁welcome ▁division ▁of ▁labour ▁for ▁the ▁host ▁conduct or ▁that ▁would ▁later ▁become ▁standard ▁practice . ▁ ▁After ▁the ▁ret irement ▁in ▁ 1 9 4 9 ▁of ▁Per cy ▁H ull ▁of ▁Here ford ▁and ▁I vor ▁At kins ▁of ▁Wor c ester , ▁S ums ion ▁remained ▁the ▁only ▁direct ▁link ▁with ▁El gar ▁amongst ▁the ▁mus icians ▁of ▁the ▁three ▁c athed r als . ▁ ▁In ▁his ▁program ▁planning ▁for ▁the ▁festival , ▁S ums ion ▁champion ed ▁the ▁performance ▁of ▁new ▁English ▁works . ▁ ▁Notable ▁premier es ▁at ▁S ums ion ' s ▁Gl ouc