Come to the Sites of Grace [Church of the Plague],talk to [Millicent],and choose [Yes].

Refresh the map.    Talk to [Millicent] and get [Prosthesis-Wearer Heirloom].

Return to [Gowry's Shack],and after talking with [Gowry],you can [Study sorcery].

Refresh the map and talk to [Millicent].

Refresh the map and talk to [Gowry].