Madden exchanged letters with Shaw on the topic, and he encouraged her to publish a pamphlet on the subject. The pamphlet, published by the Six Point Group, is quoted at length in Dora Russell's autobiography, and in a preface to one of Shaw's plays. Madden led a number of CPGB delegations to Russia in the 1950s and 1960s. She visited and travelled around Ireland extensively, going on to buy a cottage in Galway city. She became an active member of the Connolly Association, supported C. Desmond Greaves, and was a member of Sinn Féin. She vote articles for "An Phoblacht", particularly on the topic of Irish unity, as well on feminist critique of Irish issues, and studies of the status of women in ancient Irish history. Informed by this study, she followed the Irish tradition of women not taking their husband's surname after marriage. Madden lived at 75 Bedford Road, East Finchley until her death on 15 October 1998. The Women's Library, London, holds Madden's correspondence along with the records of the Six Point Group. Madden outlived her daughter, and donated her collection of prints to what would become the Irish Museum of Modern Art in 1989.