Behind the first door is a room similar to the first, though with smaller furniture, fit for gnomes and halflings. On the far side of the room is a secret door leading into the hallway from where the halfling rides came.
The next door is a pantry of sorts. It's filled with non-perishable food, all in edible (though perhaps not tasty) condition.
The third door leads to a short tunnel and then an indoor outhouse. The smell isn't terrible, though it's not a well cleaned place.
The room behind the fourth and final door is the most incredible. Inside is a wooden chamber, of far better craftsmanship than the other three rooms. Weapon racks line one of the walls, and a few oak chests contain spare chain and leather armor of several sizes. Against the door are three bells alongside three pull cords, labeled in the draconic equivalent of B C and D.
But on one wall, spread across the entire surface, is a sprawling map of the complex. The book and this map agree (though the book is more detailed), and at this point on the wall map is a large draconic 'A'. It clicks and whirs, much like a gnomish toy, and tiny hoods cover certain choke points throughout the map.
One hood, out of which a tiny red umbrella is currently poking, is at the point where you encountered the two pull strings and the trap door.
Suddenly a small bell tings, somewhere within the recesses of the wall. A tiny green umbrella pops out of a hood, indicating a place on the far side of the corridor system.
