Hrmm, this idea seems interesting, what if when you get map pieces, it you can "use" them and they disappear from your inventory into your cartography case (new item which could essentially be just another item that is stored into your key items). When you open your cartography case, you are greeted with a grid which also shows all the map pieces you have stored from "using" them in your inventory. From there you could piece together the maps which certain pieces would allow you to increase the difficulty, type of mob (think of generic mob types, for instance wavekin simply means you will get a sahagin / fish enemy of some type), and maybe even conditions (something like, everyone is poisoned throughout the whole fight). After you complete the map, it will display like the other maps you have deciphered, showing you the location you have to travel to. And something similar from there out. However, if you opt to sell your map pieces, you would be unable to see what bonuses they would give to the treasure hunt as they would only show up after you have "used" them and put them into the cartography case. Thoughts?