If you look closely certain locations are numbered on the map. What is intriguing is that these numbers are not confined to a specific set of numerics, using both standard numerals and Roman numerals, as if to suggest they are marking separate entities, different enemies, locations, loot etc. Also if you look closely in the lounge room or trophy room, as cabal shields and like are hung on the walls, all the way in the back, passed the hanger, on the wall and tables are maps. Knives are placed almost as if to say, "Look here!"