Thank you very much. I didn't quite understand the rules about the thumbnails.

About the rivers : it was one of my first maps, so I made many mistakes ;-) But I can't fix them because I lost the CC3 file, I only have the JPEG file :-/ (and I don't feel brave enough to edit the map with my mouse)
About the background : I started with the text on the periphery, but I didn't like it, the text wasn't visible enough. Personnaly, I prefer this version (and I'm in my "calligraphic period" :-D)