Board Thread:Skyrim/@comment-11982931-20130923051752/@comment-14027812-20130923215429

The guard should be standing over a grave in the graveyard.You can tell if the quest began if a corpse of Susanna the Wicked has appeared there.About the key, i think Tova's inventory has been transferred to the Hall of the Dead, where it will show up as "Tova Shatter-Shield Coffin".If you cannot find the key, there is a console command for adding the key if you are on PC.