books.google.co.uk - Explications of lives, phrases, and allusions in each of Yeat's twenty-six plays provide extensive textual, background, thematic, and performance information...http://books.google.co.uk/books/about/A_Commentary_on_the_Collected_Plays_of_W.html?id=QeWeAAAAIAAJ&utm_source=gb-gplus-shareA Commentary on the Collected Plays of W.B. Yeats
