During the First World War she served as a Red Cross nurse with a voluntary Franco-American hospital, but she returned to England with a knee infection in 1916. After the war, she and a friend, Gertrude Schlich (daughter of Wilhelm Philipp Daniel Schlich, first professor of forestry at Oxford), moved near to Battle, East Sussex, where Broster worked full-time as a writer. She was in the first batch of women to receive her Bachelor of Arts and Master of Arts in 1920 at Oxford."Degrees conferred at Oxford", Yorkshire Post, 15 October 1920, p. 5.
During the First World War she served as a Red Cross nurse with a voluntary Franco-American hospital, but she returned to England with a knee infection in 1916. After the war, she and a friend, Gertrude Schlich (daught.er of Wilhelm Philipp Daniel Schlich, first professor of forestry at Oxford), moved near to Battle, East Sussex, where Broster worked full-time as a writer. She was in the first batch of women to receive her Bachelor of Arts and Master of Arts in 1920 at Oxford"Degrees conferred at Oxford", Yorkshire Post, 15 October 1920, p. 5.