Looks great. Maybe it should be a little more yellowish. Overall contrast seems a little low. Maybe try bold fonts. Ink should stay completely black, even when all other colors are getting pale. Colors would be nice, but not like those. More like the Initials of Names or Pages in early (handwritten) books. And maybe some Sheet Gold insignia, or a wax seal.
Maybe I would also replace the pencil-like drawings (dragons, hills, swords..) with ink-equivalents, using some stroke patterns for the shadows. I don't think they used something like a pencil for a map. Not sure if it's really a good idea. No question, it's already looking great.
Edit: about colors: http://de.wikipedia.org/wiki/Initiale
Maybe I would also replace the pencil-like drawings (dragons, hills, swords..) with ink-equivalents, using some stroke patterns for the shadows. I don't think they used something like a pencil for a map. Not sure if it's really a good idea. No question, it's already looking great.
Edit: about colors: http://de.wikipedia.org/wiki/Initiale