The W.B. Yeats collection contains the major work of W.B. Yeats in all genres, including poetry, plays, criticism and fiction, collected in 22 volumes. A single edition of each work, usually the last known to have been approved by Yeats, has been included. However, both of the widely different versions of A Vision (1925 and 1937) have been included. Where available, the scholarly editions in the Scribner/Macmillan Collected Edition of the Works of W.B. Yeats ... have been used.