W.B. Yeats (1865-1939) began writing poetry as a devotee of Blake, Shelley, the pre-Raphaelites, and of nineteenth-century Irish poets including James Clarence Mangan and Samuel Ferguson. By the end of his life, he had, as T.S. Eliot said, created a poetic language for the twentieth century. The First Yeats deepens our understanding of the making of that poetic imagination, reprinting the original...