Gollum would not move. He stood shaking and gibbering to himself, until a
rush of wind came upon them, hissing and snarling over the marshes. The night
became less dark, light enough for them to see, or half see, shapeless drifts
of fog, curling and twisting as it rolled over them and passed them. Looking
up they saw the clouds breaking and shredding; and then high in the south the
moon glimmered out, riding in the flying wrack.
(And yes, that is an exact copy from the book.)