In this multi-volume edition, the poetry of W.B. Yeats (1865–1939) is presented in full, with newly-established texts and detailed, wide-ranging commentary. Yeats began to write verse in the nineteenth century, and over time his own arrangements of poems repeatedly revised and rearranged both texts and canon. This edition of Yeats’s poetry presents all his verse, both published and unpublished, including a generous selection of textual variants from the many manuscript and printed sources. The edition also supplies the most extensive commentary on Yeats’s poetry to date, explaining specific references, and setting poems in their contexts; it also gives an account of the vast range of both literary and historical influences at work on the verse. The poems are presented in order of composition, and major revisions or rewritings of poems result in separate inclusions (in chronological sequence) for these writings as they were subsequently reconceived by the poet.