c.f., _The Worlds of J. R. R. Tolkien: The Places That Inspired Middle-earth_ by John Garth

https://www.goodreads.com/book/show/53939643-the-worlds-of-j...

and esp. the photo from the review:

https://signumuniversity.org/course/lita-5315/

https://signumuniversity.org/wp-content/uploads/sites/27/202...

(I had thought I had seen a higher-resolution version, but not finding it now)