Garnett was born in
Wandsworth. She obtained a degree in geography at
University College, London and joined the staff of
Sheffield University in 1924 as assistant to the academic and explorer
Robert Rudmose Brown. It was her task to teach and this enabled the university to add Geography to its range of subjects. In 1937 she gained a doctorate. and a winner of the
Murchison Award. Garnett's contribution was eventually recognised with a DSc and a chair at Sheffield University. Her 1958 appointment made her only the second woman to be a British professor of geography. In 1969 she became the vice-president of the
Royal Geographical Society. == Death and legacy ==