In chapter eight of The Hobbit by J.R.R. Tolkien, Bilbo and the dwarves are still on their journey. Things are not quite as fun as they were in the beginning, though their travels now do seem more purposeful. As the group travels, they have to be aware of every physical hazard as well as the many enemies that are everywhere around them.
After a bout with spiders in which Bilbo is the hero and after which he reveals to his companions that he has the ring, the adventurers are all feeling rather drained and stop to rest. In fact, they all sleep quite soundly; only in the morning do they realize that Thorin is missing.
Thorin was captured by the wood-elves who were camped nearby (something the travelers should have known because they saw the lights last night). The wood-elves are naturally suspicious and distrustful, but they also have a deep dislike for dwarves. Thorin Oakenshield, "son of Thrain son of Thror King under the Mountain," is the one who got caught.
Thorin is the brave leader of his band of dwarves, a philosopher of sorts. He believes
"There is nothing like looking, if you want to find something.… You certainly usually find something if you look, but it is not always quite the something you were after."
He is not mistreated, but the chapter ends with Thorin wondering how he is going to reconnect with his companions.