Here's another little picture comparison that I found interesting. We have Bilbo's "story-writing study" in Bag End, and Frodo's, which of course is the same room.
Right away we see Bilbo's "study" is more cluttered, with papers everywhere, maps, the room's just a mess. But, also the room looks a lot brighter, the sun's shining through, it's bright and radiant.
Frodo's room this is of course him finishing the Red Book in ROTK, it's a lot darker, there's a glimmer of light, but even Frodo's clothes are more, sort of somber looking. Also, it isn't as messy as Bilbo's.
I notice this and there's a lot to compare between these two pictures. First, the clutterness of Bilbo's room, and the relative emptiness of Frodo's. Does this go to show that Frodo sort of cleaned up Bilbo's mess? He cleaned up both literally (the room- Bilbo's notes, and the Red Book) and symbolically (the ring) what Bilbo left behind?
Also, Frodo's much darker room. It's kind of sad to look at, how dark the whole setting is. Does this display Frodo can't find hapiness in Middle-earth? In the Shire? Where Bilbo's room is more "exuberant."