The Adventures of Tom Bombadil, X: Oliphaunt

The poem Oliphaunt is in the Lord of the Rings story recited by Sam Gamgee in The Two Towers (Book IV, Chapter 3), the volume where it was first published. Sam Gamgee explains "That's a rhyme we have in the Shire [...] we have our tales too, and news out of the South, you know."  This bestiary poem is related to an earlier one imagined by Tolkien called Iumbo.

The Adventures of Tom Bombadil, IX: The Mewlips

This poem depicts nightmarish creatures called Mewlips and the depressing route  one takes to their dwelling and what happens when you reach it. There exsists a precursor to The Mewlips, it is called Knocking at the Door: Lines Induced by Sensations When Waiting for an Answer at the Door of an Exalted Academic Person. Tolkien published that one under a pseudonym in Oxford Magazine (1937).

The Adventures of Tom Bombadil, VI: The Man in the Moon Came Down Too Soon

This is the second poem about the Man in the Moon, also in this one, things are a bit out of control for him when he visits the world, seeking pleasures. According to the preface to the book, the poem is derived from Gondor, based on traditions of men, but here composed by hobbits. There have been many variations of this poem, the earliest being written in 1915. Some of the themes occurs in several of Tolkiens stories, such as the aspect of a Man in the Moon. 

The Adventures of Tom Bombadil, V: The Man in the Moon Stayed Up Too Late

This is the first poem out of two featuring the Man in the Moon in this book. There are only two minor differences between this version and the one featured in The Lord of the Rings. An original version can be read in The Return of the Shadow. A revision of that one was published in Yorkshire Poetry in 1923 as The Cat and the Fiddle: A Nursery-Rhyme Undone and Its Scandalous Secret Unlocked. The poem or song is written by Bilbo Baggins.

The Adventures of Tom Bombadil, II: Bombadil Goes Boating

For the second poem in this publication, Tom is yet again the main character. This time the reader follow him on a boating trip along the Withywindle and his journey to meet Farmer Maggot. In this story we encounter familar places in Buckland and the Shire. The idea is that the events set out occured some time after Frodo and the other Hobbits visited Farmer Maggot and Tom Bombadil and that the poem is composed by Buckland hobbits.