[4] Cheffins first became involved in the cause for women's suffrage after passing a WSPU shop in Folkestone after which she went to London to "do her bit of protest.
"[5] In March 1912 the 49-year-old Cheffins threw a brick through the window of Gorringer's, a department store on Buckingham Palace Road in London.
[6] At her trial Cheffins said that she was a suffragist by conviction, because, after living and working among the very poor for more than twenty years, she had come to the conclusion that all efforts to improve their conditions were futile without the benefit of the franchise.
She supported the Women's Social and Political Union because she felt that their militant methods gave the best chance of success.
[7] On her release from Holloway Cheffins received the Hunger Strike Medal from the leadership of the Women's Social and Political Union (WSPU).