Better late than never, it's a live QnA I did on YouTube to follow up on King Bran 1 on September 1st, 2019. Featured is Wizz-the-Smith's legendary Hollow Hills material, which he kindly allowed us to discuss, and it's a great compliment to the ancient greenseer kings theory. Check out his full essay at the link below, and thanks to everyone who sent in questions! https://asoiaf.westeros.org/index.php?/topic/143917-the-caves-are-timeless-hollow-hills-magic-castles-and-greenseers/