This guide shows how to get to Havelock's note, finding the prototype's blueprint, searching Corvo's room for anything Emily left behind, saving Piero and Sokolov and getting to Callista to signal Samuel at the Hound Pit's Pub nonlethal and undetected. Note that I am playing on the hardest difficulty without any supernatural or normal upgrades. I am not picking up any Bone Charms or Runes or any other loot since it is unnecessary.