Orofer easily finds the secret door. It is in the North Wall in the North-Western corner. Orofer struggles with the door but is able to open it with Fitz's help.
Behind the door is an oddly shaped room. I will describe the walls running counter clockwise from the right of the secret door entrance:
10' North, 10' West, 10' North, 14' North-West, 14' South-West, 14' South-East, 20' South, 10' East, 10' North. In the 14'x14' area in the North-West is a statue of an elven-scout, his right hand is pointing. His left hand is upturned holding a bowl, the bowl has some coin in it.
Fitz senses another secret door in the Southern part of the room.