Blackwell’s [Rare Books], which is currently exhibiting the map in Oxford and selling it for £60,000, called it “an important document, and perhaps the finest piece of Tolkien ephemera to emerge in the last 20 years at least”.
It shows what Blackwell’s called “the exacting nature” of Tolkien’s creative vision: he corrects place names, provides extra ones, and gives Baynes a host of suggestions about the map’s various flora and fauna. Hobbiton, he notes, “ is assumed to be approx at latitude of Oxford”[.]

​-The Guardian