Forty years ago Norman Jeffares published his first biography of W.B.Yeats, however since that time much new material has come to light, both written and illustrative. This volume is a major reassessment of the poet's work, marking the 50th anniversary of his death. Professor Jeffares has drawn upon material in the Yeats collection now in the possession of the poet's son and daughter, Michael and Anne Yeats, in the Jeanne R.Foster - William M.Murphy Collection in Schenectady, New York and in the National Library of Ireland. He has had access to unpublished correspondence, and has based some of his comments on conversations with the friends and relatives of Yeats. The author has also written "A History of Anglo-Irish Literature".