▁music , ▁and ▁after ▁returning ▁to ▁civil ian ▁life ▁he ▁took ▁some ▁time ▁before ▁feeling ▁ready ▁to ▁compose ▁new ▁works . ▁He ▁re vised ▁some ▁earlier ▁pieces , ▁and ▁turned ▁his ▁attention ▁to ▁other ▁musical ▁activities . ▁In ▁ 1 9 1 9 ▁he ▁accepted ▁an ▁inv itation ▁from ▁Hugh ▁Allen , ▁who ▁had ▁succeeded ▁Par ry ▁as ▁director , ▁to ▁teach ▁composition ▁at ▁the ▁R CM ; ▁he ▁remained ▁on ▁the ▁fac ulty ▁of ▁the ▁college ▁for ▁the ▁next ▁twenty ▁years . ▁In ▁ 1 9 2 1 ▁he ▁succeeded ▁Allen ▁as ▁conduct or ▁of ▁the ▁Bach ▁Ch oir , ▁London . ▁It ▁was ▁not ▁until ▁ 1 9 2 2 ▁that ▁he ▁produced ▁a ▁major ▁new ▁composition , ▁A ▁Past oral ▁Sym phony ; ▁the ▁work ▁was ▁given ▁its ▁first ▁performance ▁in ▁London ▁in ▁May ▁conducted ▁by ▁Ad rian ▁Bou lt ▁and ▁its ▁American ▁premi ere ▁in ▁New ▁York ▁in ▁December ▁conducted ▁by ▁the ▁composer . ▁ ▁Through out ▁the ▁ 1 9 2 0 s ▁V aug han ▁Williams ▁continued ▁to ▁compose , ▁conduct ▁and ▁teach . ▁Kennedy ▁lists ▁forty ▁works ▁premier ed ▁during ▁the ▁de cade , ▁including ▁the ▁Mass ▁in ▁G ▁minor ▁( 1 9 2 2 ), ▁the ▁bal let ▁Old ▁King ▁Cole ▁( 1 9 2 3 ), ▁the ▁oper as ▁Hugh ▁the ▁Dro ver ▁and ▁Sir ▁John ▁in ▁Love ▁( 1 9 2 4 ▁and ▁ 1 9 2 8 ), ▁the ▁suite ▁Fl os ▁Camp i ▁( 1 9 2 5 ) ▁and ▁the