This is the introduction to the edition of the manuscript materials for Where There is Nothing and The Unicorn from the stars, two version of a play co-written by W.B. Yeats and Lady Augusta Gregory between 1902 and 1907, based on an early idea by George Moore. It contains a detailed survey of the composition history and their earliest publication of the play texts, as well as a assesment of the co-authorship between Yeats and Lady Gregory. A Census of the extant manuscripts and typescripts is appended.
Van Mierlo, Wim (2012) Introduction. In: Where There is Nothing and The Unicorn from the Stars: Manuscript Materials, by W.B. Yeats and Lady Gregory. Cornell University Press, Ithaca, NY, xiii-xli. ISBN 978-0-8014-5118-8
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