[4] Marshall and her mother joined the National Union of Women's Suffrage Societies (NUWSS) and created the Keswick branch.

Marshall was demonstrating what became best practice by establishing a stall in Keswick market to sell suffrage literature and raise awareness.

When Edith Palliser was ill she took over as parliamentary secretary skilfully inspiring local groups to lobby their M.P.s whilst she applied direct pressure to key figures.

Marshall was involved with senior Liberal party politicians who claimed to support women's suffrage but in effect did little.

Marshall was convinced that peace could be established by recognising the consent of the people and refusing models built of force and power.

[7] She started a relationship with Clifford Allen, Chairman of the No-Conscription Fellowship, who was imprisoned as a conscientious objector three times.

[8] Her name and picture (and those of 58 other women's suffrage supporters) are on the plinth of the statue of Millicent Fawcett in Parliament Square, London, unveiled in 2018.