▁Arm agh ▁In ▁November ▁ 1 7 7 7 ▁he ▁was ▁elected ▁organ ist ▁of ▁E ly ▁C athedral ; ▁soon ▁after ▁in ▁December , ▁he ▁was ▁made ▁organ ist ▁of ▁Br istol ▁C athedral ; ▁he ▁res igned ▁in ▁June ▁ 1 7 8 1 . ▁His ▁last ▁appointment ▁was ▁as ▁organ ist ▁of ▁Arm agh ▁C athedral ▁in ▁ 1 7 8 2 . ▁In ▁ 1 7 9 4 , ▁in ▁poor ▁health , ▁he ▁left ▁Arm agh ▁and ▁retired ▁to ▁Ex eter , ▁where ▁he ▁died ▁on ▁ 8 ▁September ▁ 1 8 0 3 . ▁A ▁plain ▁white ▁mar ble ▁table t ▁was ▁placed ▁in ▁his ▁memory ▁at ▁his ▁rest ing ▁place ▁in ▁St ▁Paul ' s ▁Church , ▁Ex eter . ▁The ▁church ▁was ▁demol ished ▁in ▁ 1 9 3 6 ▁and ▁the ▁mem orial ▁moved ▁to ▁C athedral ▁Close . ▁ ▁Works ▁Lang don ' s ▁works ▁include , ▁besides ▁several ▁anth ems , ▁Tw elve ▁Songs ▁and ▁Two ▁Cant at as , ▁op us ▁ 4 ▁( Lond on , ▁unknown ▁date ); ▁and ▁Tw elve ▁G le es ▁for ▁Three ▁and ▁Four ▁Vo ices ▁( Lond on , ▁ 1 7 7 0 ). ▁In ▁ 1 7 7 4 ▁he ▁published ▁Div ine ▁Harm ony , ▁being ▁a ▁Collection ▁in ▁score ▁of ▁Ps al ms ▁and ▁Anth ems . ▁At ▁the ▁end ▁of ▁this ▁work ▁are ▁twenty ▁ch ants ▁by ▁various ▁authors , ▁all ▁printed ▁an onym ously ; ▁the ▁first ,