I apologize to anyone who has read this far in the hope of learning anything new from within the story from me, but I’m not going to inflict my observations here now; I’d probably be just boring you if you are among the potentially interested.
Oh well, just one thing. I have new theory about the chest: It is not a container, it is a device. In two senses, it’s a mechanism (that is set off by turning the key in it), and it is a teaser (that will nag at the back of your mind for two more novels), an element of plot. And therefore it is a pun too, and with that, it is three things actually.