Constance Shacklock
Born: 16th April 1913, Nottingham, England
Died: 1999, London, England
Nationality: English
Constance Shacklock OBE was an English contralto. After more than a decade of roles with the Covent Garden Opera Company, with other companies and on the concert stage, Shacklock performed for six years in The Sound of Music in London as the Mother Abbess. She taught singing at the Royal Academy of Music from 1968 to 1978.
Read more at https://en.wikipedia.org/wiki/Constance_Shacklock