All 4 Uses

content
in
The Hobbit
(Edited)

Soon Bilbo's stomach was feeling full and comfortable again, and he felt he could sleep contentedly, though really he would have liked a loaf and butter better than bits of meat toasted on sticks.
p. 103.9

contentedly = in a satisfied manner
These were inspired largely by the Master and they did not particularly please the dwarves, but in the meantime they were well contented and they quickly grew fat and strong again.
p. 183.7

contented = satisfied
But the land was green and there was much grass through which the hobbit strolled along contentedly.
p. 273.3

contentedly = in a satisfied manner
He was quite content; and the sound of the kettle on his hearth was ever after more musical than it had been even in the quiet days before the Unexpected Party.
p. 275.2 *

content = satisfied or happy

Definitions:

(1) (content as in: content with how things are)
satisfied
(2) (meaning too common or too rare to warrant focus)
The word forms content and contents are also commonly used to refer to what is inside something else.