This will summon forth a man named Arl Foreshadow, though he'll quickly disappear thereafter. Then, head into the adjacent room and find Summoning The Fourth hiding behind the shelf on the left. Hit the Summoning Font, and then hit the next eight items in exact sequence: Tome of Spirit Personages, Rodercoms Uncommon Calling, Magus Gorvish, Elvorn's Grande Bestiary, Common Table Carving Spot, Spiritorum Etherialis, Magus Gorvish, and Novice Phylactery. This quest is added when Morrigan joins the party at Flemeth. After being rescued by Flemeth from the Tower of Ishal, the Warden decides to use the treaties from The Grey Wardens' Cache to gather aid against the Blight - one of these treaties is with the Circle of Magi. This will make a Fade Rifter appear, a moderately powerful beast you'll be forced into battle with. Broken Circle is one of the four main quest lines in Dragon Age: Origins that must be completed before calling the Landsmeet. Then, hit the following six objects in the order written here, exactly: Elvorn's Grande Bestiary, Common Table Carving Spot, Spiritorum Etherialis, Magus Gorvish, and Novice Phylactery. Hit the Summoning Font to begin the third cycle. This will make a ghost appear, though it will shortly thereafter disappear. Then, hit the Summoning Font, and hit the items in the following sequence: Rodercoms Uncommon Calling, Magus Gorvish, and finally, Summoning The Second.
You can comb his body for goods if you so desire. By doing this, a deceased Spirit Hog will appear. So, do that, and then hit the Tome of Spirit Personages and, finally, Summoning The First.
Each cycle begins by touching the Summoning Font.