So I guess, then, what does this have to do with our old friend The Book of Briars? This must be a visual reference to the new Book (age) that we’re entering now that the Book of Kings is over.
Could the “leaden veil” be the remnants of what is separating us living in the Book of Kings from those co-conterminously in the Book of Briars? It seems like his herald can peer though. Unless there’s something else. What keeps the Low from interacting with us? Could that be a possibility?