She was the first child of Caroline and Dr James Harrison Rigg.
Her father was a Wesleyan minister but in time he led Westminster Training College.
[1] In 1883 she was invited to become a member of the Association of Head Mistresses (AHM) by its founder Frances Buss.
[2] Dorothy Brock was appointed to succeed her as the head of the Mary Datchelor school in 1918.
[3] Rigg died in Brixton in 1929 leaving a bequest to support girls who wanted to go to university.