Though they divorced the next year,[citation needed] with Eric killed in action shortly thereafter, Marianne retained Mathy's name for the remainder of her life.

Her musical education included piano, theory, speech training, interpretation and voice production, with a special course for the treatment of damaged vocal cords.

In 1929, Mathy received the State Certificate, Berlin, with Honourable Mention in recognition of her public performances and as a teacher of singing.On Malcolm Sargent's advice,[2] the couple emigrated in 1939 to Sydney, Australia.

A highly respected teacher of opera and classical singers, Mathy taught fifteen winners of the Melbourne Sun Aria.

[3] Many of her pupils became nationally and internationally renowned opera singers and include Althea Bridges, June Bronhill, Joan Sutherland, Peter Cousens and Lyndon Terracini.