Abbey Theatre works by Seumas O'Cuisin, Fred Ryan and Yeats. The third base was the financial support and experience of Annie Horniman, a middle-class Englishwoman with previous experience of theatre production, having been involved in the presentation of George Bernard Shaw's "Arms and the Man" in London in 1894. An acquaintance of Yeats from London circles, including the Order of the Golden Dawn, she came to Dublin in 1903 to act as Yeats' unpaid secretary and to make costumes for a production of his play "The King's Threshold". Her money helped found the Abbey Theatre and, according to the critic Adrian Frazier,
Mary Devenport O'Neill Colum, W. B. Yeats, Richard Irvine Best, Frank O'Connor, Francis Stuart and Iseult Gonne. She became particularly close to Yeats, who she confided in. Yeats' recorded their weekly consultations in his diary while O'Neill was writing "A vision" (1925). In his "Oxford anthology of English verse" from 1936, he included one of O'Neill's poems. In 1917, she contributed lyrics to her husband's play "The kingdom maker". She published her only book in 1929, "Prometheus and other poems". After this she occasionally contributed primarily modernist plays and poetry to "The Dublin Magazine", "The Irish Times" and "The Bell". O'Neill collaborated with