Take out the archers on the sides and then the Dragon Thrall that lands. Try to sleep the Emissary and Alpha in the back so you can take care of them later. Take out the rest of the small fry and head inside. To the right is a chest, to the east at the four-way is a pile of books, same on the west. Head down the Main Hall and a large amount of Shades will spawn around you. Defeat the Genlock Conjurer at the southern end and head down the hall disarming the trip wire. Enter the south west room to find three weapon stands and a wooden crate to loot.
You can kill the enemies in the western room if you want but enter the southeastern room. Loot the four armor stands, two chests, and two wooden crates. The northern room has a cabinet, armoire and a chest to loot. Enter the east room and check the barrel then speak with Sandal . Head to the second floor.