Like the Ring and the
palantíri, the lights above the marshes seek to steer them away from their path and tempt them towards some evil end. Frodo, lethargic and hopeless, seems almost to fit in with the corpses in the water. He isn’t startled by them as Sam is, but reaches his hands towards them, emphasizing both his vulnerability to seductive influence—since he’s also fighting off the corrupting power of the Ring—and his growing weariness. Sam, as ever, is his guide away from danger, but even Sam can only do so much to save him from the internal strife that’s turning him slowly corpse-like.