I will solidly admit that I haven't read "The Demon's Covenant," but now I will be. I just have to ask ... is the one off mention of "Arthur Dee" based off the son of the alchemist John Dee? I was researching Arthur Dee and Google kept picking up on this one mention. But then wouldn't supply if I was right. I always get very excited to know if anyone actually knows of Arthur Dee apart from me, since he's so niche.