The Adventures of Tom Bombadil actual translation from the "Red Book of Westmarch", and contains some background information on the world of Middle-earth that is not found elsewhere: e.g. the name of the tower at Dol Amroth and the names of the Seven Rivers of Gondor. There is also some fictional background information of those poems, linking them to Hobbit folklore and literature and to their actual writers (some of them are ascribed to Samwise Gamgee). The book uses the letter "K" instead of "C" for the /k/ sound in Sindarin (one of the languages invented by Tolkien), a spelling variant Tolkien used many times
Minor places in Middle-earth Muil as far north as the Argonath. In "The Two Towers", Frodo and Sam struggled through the eastern Emyn Muil en route to the Black Gate of Mordor. Tolkien writes that he padded Frodo and Sam's difficult crossing with enough days to synchronize their movements with those of Aragorn and Gandalf. Frodo and Sam eventually escaped using a rope to descend a cliff to the Dead Marshes. In the meantime the Uruk-hai, carrying Meriadoc Brandybuck and Peregrin Took as captives, traversed the western Emyn Muil. They were pursued by the Three Hunters: Aragorn, Legolas and Gimli. The Emyn Uial (S.