In 1897, along with Yeats and
Arthur Griffith, she organized protests against the Queen's Jubilee. At Easter 1900, she founded
Inghinidhe na hÉireann ("Daughters of Ireland"), a revolutionary women's society, to provide a home for Irish nationalist women who, like Maud herself, were considered unwelcome in male-dominated nationalist societies. In
April 1902, she took a leading role in a play by Yeats,
Cathleen Ní Houlihan. She gave a powerful acting performance in her portrayal of Cathleen, the "old woman of Ireland," who mourns for her four green fields (provinces), lost to the English colonizers.
In the same year, Maud joined the
Roman Catholic Church. She refused many marriage proposals from Yeats because she viewed him as insufficiently
nationalist and because of his unwillingness to convert to Roman Catholicism]] ).