Page 185. " Ho! Tom Bombadil, Tom Bombadillo! "

Tom Bombadil singing about himself from The Lord of the Rings audio-book:

Page 187. " To Frodo's great joy the hobbits stirred "

 A group of Swedish artists and musicians worked on a musical video version of The Lord of Rings.  Their project was never finished but this scene from the Barrow Downs survived.

Page 190. " they were overcome by the evil king of Carn Dûm in the land of Angmar. "
Carn Dûm
GNU Free Documentation LicenseCarn Dûm - Credit: Matěj Čadil/Wikimedia Commons
The evil king mentioned here is the Witch-King of Angmar, the Lord of the Nazgûl and Sauron’s chief servant. When Sauron returned in the Third Age, he secretly came to Dol Guldur in Mirkwood and gathered the nine Nazgûl to him. Seeing that the northern kingdoms of men were vulnerable, he sent the Lord of the Nazgûl, who was a powerful sorcerer, to destroy them. Establishing a kingdom in Angmar, the Lord became the king of Carn Dûm and became known as the Witch-King. There he succeeded in bringing about the downfall of the Dúnedain, but Isildur's line (heir to the thrones of Arnor and Gondor) managed to survive and continued in secret. With the help of the elves the Witch-King was eventually defeated and driven from his realm.