There are 16 different pieces of every treasure map or set of instructions. Other than the Sumo Sally Pass, you will need to collect all 16 different pieces to complete a map. Once completed, it will be added to your Treasure Map Collection and will unlock a feature on the site. You can purchase these from either the Treasure Map Shop or from the Account Upgrades Shop. The Native Fairy rewards you for this collection. You can read more at this Treasure Map Guide.