Rooms 5, 6, and 7 down below are devoid of occupants.
Room 5's description: This chamber is clean and well organized, despite its grim furnishings. Small barbed cages rest against the wall, not quite large enough to stand in and not quite wide enough to sit in. Several barrels of water are on the floor to the north, along with a bloodstained mop. A simple cot and a chair and desk round out the room's contents.
Under the cot is a small coffer containing 155 gp, 320 sp, and a fine ruby-set bracelet in the shape of a sinuous lion.
Room 6's description: Three large animals-a leopard, a wild boar, and a crododile-stand at the ready in the southern portion of this room... but on second inspection, they prove to be stuffed and mounted for display. The walls are decorated with a striking tapestry depicting a five-headed dragon in a pose of destructive rage. A free-standing perch for a falcon or eagle stands in the room's northwest corner. A cot heaped with fine furs lies to the west, next to a large table. Atop the table lies a dead batlike creature, its abdomen cleaned and stuffed with salt and wood chips, and its wings pinned to the table's surface with several thin pins. An iron chest sits on the floor beneath the table.
The chest is locked.
Room 7's description: This large room might have once been a well-appointed library, but now its shelves lie in disarray along the east and west walls. No sign of any books are apparent. A large portion of the ceiling is missing, as is a corresponding portion of the floor, which opens into the dark waters of the lake below.
The dragon's horde is gathered here. It includes a magical staff four feet tall made of bronzewood with brass bindings and tipped with a sharp spearpoint (suitable for use as a javelin), a deep rouge-colored cape with an aura of transmutation, and a pair of magical bracers. In addition to the items, the rest of the horde includes a magical horn, 8,800 sp, 2,300 gp, 130 pp, a gold necklace, eleven small gemstones (spinnels, tourmalines, and peridotes).