– drawn by her in 1912 in her copy of
The Poetical Works of Percy Bysshe Shelley Gliddon joined the Croydon branch of the
Women's Social and Political Union (WSPU) in about 1910 at about the same time that her brother Cuthbert Paul Gliddon was acting as an organiser of the
Men's Political Union for Women's Enfranchisement. He campaigned under the name 'Charles Gray' to save his parents' embarrassment while Katie Edith went under the
pseudonym 'Catherine Susan Gray' for the same reason. By 1911 she had published articles on
women's suffrage in several newspapers. The New York-based Davis & Langdale Company lists an ink and brush painting titled ‘Gliddon’ by the artist
Walter Sickert from about 1912 which almost certainly portrays Katie Gliddon as she knew Sickert's sister
Helena Swanwick, who was also an activist for
women's suffrage. In addition, both Gliddon and Sickert were members of the
New English Art Club. In March 1912 she smashed the window of a Post Office in
Wimpole Street and was arrested and sentenced to two months imprisonment with hard labour in
Holloway Prison which she served during March and April 1912. Gliddon's sentence of hard labour was sewing and she wrote in her prison diary that she deliberately sewed badly. ==Later years==