Well, since then I've managed to discover the map that Brann himself put together as he wandered (or was dragged) around various new places. It was hard for a boy from a small village to get his head round where he was and how each location fitted into an overall picture, so he took in explanations and pierced together more localised maps that he came across to put together something that gave him a better idea.
I have done my best to represent it in this medium and of course, Brann is not a cartographer, so our best efforts might not exactly represent precise locations or scales, and may include some inaccuracies if Brann has misunderstood something, but it should give you an idea of where he has been.
Naturally, as Brann's journeys continue and he visits new places or, at least, becomes aware of them, he will add to it and I'll update it here.
So here it is!