In The Lord of the Rings: The Fellowship of the Ring (2001)and The Hobbit: An Unexpected Journey (2012) and The Hobbit: The Desolation of Smaug (2013), chapter titles from the books are included as part of dialogue.

1 is a reference the Chapter 6 of The Hobbit, Riddles in the Dark.

2 is a reference to Chapter 4 of The Fellowship of the Ring, A Shortcut to Mushrooms.

3 is a reference to Chapter 7 of The Hobbit, Out of the Frying Pan, Into the Fire.

4 is a reference to Chapter 13 of The Hobbit, Not At Home.