Debussy’s early setting of Mallarmé’s ‘Apparition’ provides the focus for an exploration of the way music stages the process of appearing and coming to presence. The foregrounding of this, over any idea of narrative or drama, is traced in La damoiselle élue, the Prélude à l’après-midi d’un faune, Pelléas et Mélisande, La mer, Jeux – works whose central concern is the play of appearing and disappearing. This category is explored theoretically through the work of Jankélévitch, Martin Seel, and Derrida. Derrida’s critique of the metaphysics of presence is central here, as is a consideration of Mallarmé’s discussion of the dancer Loïe Fuller. The idea of an evanescent music is thematised in the ‘fairy’ creatures of Debussy’s piano preludes, a kind of fictional embodiment of Mallarmé’s idea of poetry as a ‘dispersion volatile’.