She was born in London in 1903, the daughter of an architect, and studied at Hornsey School of Art and Regent Street Polytechnic.
Her preferred medium was watercolour, and she admired the work of Beatrix Potter, Kate Greenaway and Arthur Rackham.
[1] In the 1930s, Boswell began drawing adventure picture strips for the comics of Amalgamated Press.
The series had been originated by G W Backhouse in 1927, and Boswell worked on it from 1939, first for the weekly comic Crackers and later for Jingles.
Amongst her best known works are the dust jackets she produced for Enid Blyton’s “flower” and “holiday” book series during the 1940s and 1950s.