** The Dead Marshes

On either side and in front wide fens and mires now lay, stretching away southward and eastward into the dim half-light. Mists curled and smoked from dark and noisome pools. The reek of them hung stifling in the still air. Far away, now almost due south, the mountain-walls of Mordor loomed, like a black bar of rugged clouds floating above a dangerous fog-bound sea.

--TTT, "The Passage of the Marshes"