ella . ▁Her ▁voice ▁im pressed ▁influ ential ▁listen ers ▁and ▁she ▁was ▁offered ▁a ▁contract ▁to ▁sing ▁at ▁the ▁Metropolitan ▁Opera ; ▁but ▁she ▁decl ined ▁the ▁Met ▁offer ▁to ▁gain ▁stage ▁experience ▁in ▁England , ▁and ▁never ▁again ▁had ▁a ▁chance ▁to ▁sing ▁with ▁the ▁New ▁York ▁company . ▁ ▁Austral ▁d uly ▁went ▁to ▁London ▁where ▁she ▁was ▁promoted ▁by ▁the ▁leading ▁British ▁bass ▁of ▁the ▁day , ▁Robert ▁Rad ford . ▁She ▁made ▁her ▁Cov ent ▁Garden ▁debut ▁on ▁ 1 6 ▁May ▁ 1 9 2 2 ▁as ▁Br ün n h ilde ▁in ▁Wagner ' s ▁Die ▁Walk ü re , ▁and ▁later ▁in ▁the ▁same ▁role ▁in ▁Sieg fried . ▁She ▁shared ▁this ▁role ▁with ▁Fr ida ▁Le ider , ▁who ▁received ▁greater ▁acc laim ▁due ▁to ▁her ▁superior ▁acting ▁skills . ▁Austral ' s ▁other ▁roles ▁at ▁Cov ent ▁Garden ▁included ▁Is ol de ▁and ▁the ▁title ▁role ▁in ▁Ver di ' s ▁A ida . ▁ ▁In ▁ 1 9 2 3 , ▁Austral ▁appeared ▁with ▁D ame ▁Nell ie ▁Mel ba , ▁who ▁called ▁her , ▁" One ▁of ▁the ▁wonder ▁voices ▁of ▁the ▁world ", ▁pra ising ▁the ▁pur ity ▁of ▁her ▁tone ▁and ▁the ▁gle aming ▁power ▁of ▁her ▁high ▁notes . ▁Unfortunately ▁for ▁her ▁career , ▁due ▁to ▁prev ail ing ▁circumstances ▁and ▁the ▁re put ed ▁ant ip ath y ▁of ▁conduct or ▁Bruno ▁Walter , ▁she ▁ended ▁up ▁singing ▁more ▁with ▁the ▁British ▁National ▁Opera ▁Company ▁than ▁at