or ▁Fritz ▁Re iner . ▁However , ▁she ▁never ▁appeared ▁at ▁Bay re uth , ▁or ▁at ▁the ▁Vienna ▁State ▁Opera . ▁She ▁was ▁negoti ating ▁to ▁sing ▁in ▁Vienna , ▁but ▁this ▁did ▁not ▁event uate . ▁ ▁Austral , ▁however , ▁did ▁become ▁a ▁principal ▁singer ▁with ▁the ▁este emed ▁Berlin ▁State ▁Opera ▁in ▁ 1 9 3 0 . ▁It ▁was ▁there ▁in ▁that ▁same ▁year ▁that ▁she ▁showed ▁the ▁first ▁signs ▁of ▁multiple ▁s cl eros is , ▁which ▁manif ested ▁themselves ▁on ▁stage ▁during ▁a ▁performance ▁of ▁Die ▁Walk ü re ▁opposite ▁bass - bar it one ▁Friedrich ▁Sch orr . ▁Her ▁opera ▁career ▁gradually ▁suffered ▁as ▁a ▁result ▁of ▁the ▁advance ▁of ▁this ▁deb il it ating ▁disease , ▁but ▁she ▁was ▁still ▁able ▁to ▁dev ote ▁herself ▁to ▁concert ▁and ▁rec ital ▁work , ▁developing ▁a ▁large ▁li eder ▁re per toire , ▁although ▁she ▁also ▁sang ▁oper atic ▁pieces . ▁Her ▁appearances ▁in ▁opera ▁during ▁this ▁time ▁included ▁ones ▁in ▁her ▁home ▁country , ▁Australia , ▁where ▁she ▁tou red ▁with ▁ten or ▁Walter ▁W idd op ▁in ▁ 1 9 3 4 – 3 5 , ▁singing ▁the ▁Australian ▁premi ere ▁of ▁Les ▁p ê che urs ▁de ▁per les . ▁ ▁She ▁returned ▁to ▁Britain ▁in ▁ 1 9 3 9 , ▁and ▁appeared ▁in ▁many ▁benefit ▁concert s ▁during ▁the ▁early ▁part ▁of ▁World ▁War ▁II , ▁before ▁her ▁ill ness ▁forced ▁her ▁to ▁ret ire ▁in ▁ 1 9 4 0