William Blake, the English artist and writer, had an enormous impact on Yeats.The Complete Poetry and Prose of William Blake, edited by David V. Erdman, William Golding, and Harold Bloom and first published in 1965, is widely regarded as the best available source of Blake's works.

Lady Augusta Gregory, Yeats's patron and close friend, collected stories of Irish heroes and powerful gods in Irish Myths and Legends. Originally published in 1904 as Gods and Fighting Men, the book has a preface by Yeats.

Yeats referred to John Synge as the greatest Irish dramatist. All of Synge's play have been collected in one volume, "The Playboy of the Western World" and Other Plays, published in 1998 and edited by Ann Saddlemyer. The volume's introduction sets the plays in the context of the times and the Irish Literary Movement, also focusing on Synge's role...