William Butler Yeats (1865 - 1939) was an Irish poet and dramatist, who won the Nobel Prize for Literature in 1923.
His most famous works include The Tower (1928) and Cathleen Ní Houlihan (1902). Yeats was interested in mysticism, but a large percentage of his work also reflected the beautiful Irish countryside where he grew up.
In 1932 he founded the Irish Academy of Letters, and shortly before his death he published The Oxford Book of Modern Verse (1936).
Some of the last lines he wrote before dying were:
Cast a cold eye
On life, on death.
Horseman; pass by!"
If you are interested in learning more about W.B Yeats then the Yeats Society Sligo is a fantastic place to look.