Cheffins was born in Holborn in Middlesex in 1863,[1] the daughter of Mary Ann née Craven (1837–1891) and Charles Richard Cheffins (1833–1902), a civil engineer and later a manufacturer of Portland cement.[2] In 1891, at age 27, she was listed as living with her recently widowed father at The Grange House in the hamlet of Grange in Kent.[3]
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. On being arrested she appeared at Bow Street Magistrates' Court on 12 March 1912 before being arraigned at the London Sessions seven days later on 19 March 1912.[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. Cheffins was sentenced to four months in Holloway Prison where she went on hunger strike and was forcibly fed. She was one of 68 women who added their signatures or initials to The Suffragette Handkerchief embroidered by prisoners in Holloway Prison in March 1912, and kept until 1950 by Mary Ann Hilliard, and still available to view at the Priest House in West Hoathly.[7] On her release from Holloway Cheffins received the Hunger Strike Medal from the leadership of the Women's Social and Political Union (WSPU).