Mount Houzell - go left after entering the cave.
Viewing post in Any listed guidelines for all memoir pages?
Sadly, I'm still sitting at 16 pages right now, though the total count should be 17. I revisited everything after the world merge, right before entering Babil Tower, just to make sure I didn’t miss anything. It’s possible one slipped through from the first world in this run.
I’ve already been to the Auction House, but no pages have dropped this time. I vaguely remember getting that page the very first time I visited the town, so maybe that’s where the gap is coming from.