On a Northumberland Yoon-Suin

I am "doing a thing", tentatively referred to as 'Northumberland Yoon-Suin'. I mentioned it briefly here, but the basic idea is to do Yoon-Suin in reverse. If Yoon-Suin allows you to create a version of Southern Asia which a medieval European might have imagined from stitched-together myths, rumours and fragments of knowledge about the real thing, then this will allow you to create a version of Northumberland which a person from Late Classical India might have imagined from stitched-together myths, rumours and fragments of knowledge about the real thing.

It has the ruins and detritus of a long-lost Empire, storm giant aristocrats, elves which steal people, dwarves who always lie to non-dwarves and always tell the truth to other dwarves, bogles and redcaps and grindylows and shellycoats, and a dungeon made from a gargantuan gorse bush. It is on a much smaller scale than Yoon-Suin and is supposed to be 'droppable' into an existing D&D campaign map. I am reasonably confident it will be completed at some point rather than end up as vapourware.

Here is a preliminary map.