Massy helped Edith Rigby gate-crash a meeting featuring Winston Churchill in Preston and threw a stone through the window of the post office.

It was wrapped in paper containing the statement: 'Message to Mr Winston Churchill: This stone through your post office window is to remind you of your broken promises to the Suffragists of Manchester and Dundee.’[3] She was arrested and pleaded guilty to causing £2 damage.

[2] In 1913, together with her mother, she enquired with Sir William Byrne at the Home Office about the condition of Emmeline Pankhurst who was imprisoned in Holloway Prison.

[7][page needed] They raised money for her gravestone in Brompton Cemetery and a statue of her outside the House of Commons (which she had frequently been stopped from entering).

Massy's prison badge and Hunger Strike Medal were placed in a casket in the plinth of Emmeline Pankhurst's statue in the Victoria Tower Gardens.