Interwoven with natural structurations and personal history, the flesh, in Merleau-Ponty’s gradually-forged conception, is nourished by the combined influences of neurology, Gestaltpsychology and psychoanalysis. This triple influence undergirds a recurring theme in his later writings: the mirror. "The flesh is a mirror phenomenon," Merleau-Ponty tells us. The unpublished manuscripts reveal that this famous clause refers neither directly to Husserl, nor to Wallon and Lacan, but is driven by contemporary readings of Paul Schilder and Wolfgang Metzger, who study the phenomena of distanciated migrations of the body-image in vision. The mirror mingles objective body with phenomenal body, in an effective community between my lived body and its external image. It shows how the flesh lives both within and outside of itself, animated by an essential incompleteness that engages perception in a process of incorporation and, thus, hints at intercorporeity.