In July of 1914 Yeats began communicating during seances with a spirit which he called his "daimon", one Leo Africanus, a Renaissance geographer and traveller. At Leo's request, through the voice of the medium, Yeats began a written correspondence in which he would write questions and observations to Leo, and Leo would answer through Yeats's hand. This correspondence would prove influential in Yeats's evolving concept of the sources of artistic inspiration as emanating from the interaction between the physical and the spiritual worlds. The growth of the daimon concept out of Yeats's divided-self theory during his correspondence with Leo Africanus and then its explication in the 1917 Per Amica Silentia Lunae.
