This quest is unlocked upon reading a note from a table early in The Descent quest line. The note forms part of a crazed dwarf’s journal. As note 1 of 4, the other three can be found throughout the darkspawn warrens and the ruins of Heidrun Thaig.

• The second note is in a room just before you proceed through the door with the missing gears in the darkspawn warrens, in the same room where Builder’s Towers is acquired.

• The third note is inside the eighth Sacrificial Gates of Segrummar, which can be found in the Ruins of Heidrun Thaig near the central bridge.

• The fourth note is in a small cave within the Ruins of Heidrun Thaig. The cave entrance can be found just before the chamber where you fight an Emissary Alpha and Ogres.