[The Squatter of Amon Rûdh]

Incidentally, on the subject of JRRT's Venice/Gondor statement: One of the things that really strikes me about Middle Earth is that to Tolkien it was all so real: I believe he even wrote philological essays on Sindarin.
By comparison, H.P. Lovecraft did make up some lore, even titles of books, but only those he required for the stories he was writing. Tolkien came up with everything and then quoted fragments of it in his text and this really shines out on reading. So much more convincing.

This is by way of a whimsical musing, for which I apologise in advance, but if JRRT had invented the Cthulhu mythos, I wonder if we'd be able to buy complete copies of the Necronomicon... I can't help feeling that we would.