I have to ask you to try not to spoil yourself too quickly by reading this walkthrough. It's very important to pay attention to what is said, and to the journal entries; not only to understand the story, but for clues too. There are clues for practically everything, although some may be a little obscure. Just sitting back and letting your mind mull it over for a minute may be enough to give you an idea how to solve your problem. Keep in mind that the solution may not always be close at hand. The Black Mill is as much about puzzles as about fighting, if not more. But there are always times when you get well and truly stumped, and that's when you should go and read this walkthrough.