2 notes? ah... it should be one, I'll check this bug... well, after you stay a new passage opens, to the left, and then up, and to the right, you will find a bigger hole, check it. It's a little below the exit.
Got it. Had not realized the big hole could be interacted with since no items other than the notes triggered events. Maybe Nadia could toss a note out of the hole after we read the final note and that could trigger the rescue.
Thanks for taking the time to help me figure it out :)