^Hesiod, Theogony 79–80: This belief in the goddess's identity, however, really cannot be proved from the text of the Iliad, because there is no evidence as to the referent of θεά (goddess). Neither Kirk nor Leaf makes such a claim in their commentaries on the Iliad. They simply say that she is "the Muse" (Μοῦσα). Kirk does say that it was conventional for Muses to invoked at the beginning of oral poems, since the process of the oral tradition was for the Muse to "sing" through the singer. See G. S. Kirk, ed., Books 1–4, vol. I in The Iliad: A Commentary (Cambridge: Cambridge University Press, 1985), p. 51; and Walter Leaf, ed., Books I–XII, vol. I of The Iliad. 2nd ed. (London: Macmillan, 1900), p. 3.