Rentoul's first known published work was a poem, "The Comet and the Jook", published in
The Bulletin in 1901. She wrote the words for the Exhibition Ode, "God Guide Australia" set to music by
Florence Ewart and performed at the
Australian Exhibition of Women's Work held in Melbourne in 1907. An alternative arrangement was composed by
Georgette Peterson. Rentoul wrote a number of children's books that were illustrated by her younger sister, Ida Rentoul Outhwaite. She taught classics (Greek, Latin and Ancient History) at Presbyterian Ladies' College from 1913. In 1915, with her mother and father, who was then chaplain-general of the Australian Defence Forces, she contributed poems to
At the Sign of the Sword. Illustrated by her sister, Ida, its sale raised money for soldiers wounded in World War I. == Selected works ==