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In page Astra Blair:

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Blair was born Margaret Jean Waugh[1] in India and educated in England and West Africa. After finishing school Blair took up a scholarship at The Royal Academy of Music with singing as her principal study. Her professional debut was as a mezzo-soprano with Glyndebourne Festival Opera; she later joined the Sadlers Wells Opera, which became the English National Opera. In 1954 she married the opera singer Raimund Herincx and had three children. In 1972 she established Music and Musicians Artists' Management, an operatic and concert agency in London.[citation needed]