A Poetics of Becoming: The Mythography of Cy Twombly, centres upon Proteus, a painting made by the artist Cy Twombly in 1984. The chapter uses this particular work as a means of unpacking the artist's complex and manifold relationship with mythology. With regards to both the facture and the matiere of Proteus, the author argues that the visual poetics of the artist's work results from what is claimed to be the painting's "becoming"