Gollum:
What has roots as nobody sees,
Is taller than trees,
Up, up it goes,
And yet never grows?
[A mountain]
Bilbo:
Thirty white horses on a red hill,
First they champ,
Then they stamp,
Then they stand still.
[Teeth]
Gollum:
Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless...