To investigate the Royal Scribe’s office in
End of The Snake in Assassin’s Creed: Origins interact with the scroll on the desk. Then interact with the broken ladder on the
floor. Climb to the top of the shelves at the back
right of the room and then go along the top all the way to the left, to the statue and
then the shelves on the left of the Royal Scribe’s office. Pick up the key at the top of the left shelves. Use the key to interact with the chest.