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 on its way through the forest. Treebeard and the Ents, together with Meriadoc Brandybuck and Peregrin Took, traversed the southern spur of Methedras, a high ridge, on their march from Fangorn to Isengard. Mindolluin (S. 'towering head blue') was the easternmost peak of the White Mountains. The city of Minas Tirith stood upon the Hill of Guard, the eastern shoulder of the mountain. In "The Return of the King", shortly after Aragorn's coronation as King Elessar, Gandalf took him by an ancient path that led up Mindolluin to a high hallow that overlooked the city far below. There he discovered,