Instructions
Go to the library to find the first locked door. Walk up to the Hero of Skill statue in the upper left-hand corner of the room, and press "A" to read its inscription.
Read the inscription on the Hero of Strength statue in the upper right-hand corner of the room.
Interact with the Hero of Will statue in the lower left-hand corner of the room. Read the final statue in the lower right-hand corner. The door opens to reveal a chest, and within the chest is a random treasure. The treasure changes based on your current level.
Go to the hallway decorated with two deer heads on the walls. Aim your gun between the antlers of the deer head on the left. Fire the gun to hit a switch. The switch moves to the other deer head.
Shoot the deer head on the right to open the locked door. Beyond it is another chest containing random treasure.