Irish art Evie Hone worked in stained glass. Portraitists have included Daniel Maclise, John Lavery, William Orpen (both these War Artists in WWI), John Butler Yeats (father of Jack and William Butler), and Henry Jones Thaddeus. Apart from Francis Bacon, who left Ireland as a young man, the best-known 20th-century Irish artist was Jack Yeats, brother of the poet, also with an individual style that is hard to classify. The art of Seán Keating was poised between Social Realism and Romanticism, and addressed public and political themes in an emerging nation. Irish Modernism began with Mainie Jellett, with later participants being The
William Mercer (poet) an inordinate self-conceit' (DNB). But his conceit did at least ensure that enough information survived to reconstruct the outline of his life." Mercer has been mistakenly credited by some with writing "The Moderate Cavalier, or, The Soldier's Description of Ireland" which was published in 1675, but the William Mercer who wrote it had served as a Royalist in the English Civil War. William Mercer (poet) William Mercer (born circa 1605, died in or after 1675), was a Scottish poet and army officer. At fifteen he ran away from school to become a soldier and fought in the 30 Years War.