We love the Ordnance Survey's work for their amazing diligence in ever progressing toward greater accuracy... but we love them even more for works like this from 1935, "Britain In The Dark Ages" . A historical look back full interesting archaeological notations.
Is it just us, or does this feel like it might have been a big influence on later fantasy land mapmakers?
@oldmapgallery does anyone have this as a slippymap?