Picked his bones in whispers.
Zombie motif: Phlebas still personified even in death, not just a body but "he" who can "forget" as if he's still experiencing something of the world buried at sea. Not rats this time but the sea picking his bones feel similar, like the rats or sea swell interacting with the bones, moving them around to give them motion and feigned agency, or maybe more along the lines of illustrating how exposed the inner structure becomes after death, at the mercy of the ocean or creatures passing by