Gnome rogue spoiler

From Basin Wiki

Cunning dagger is a good weapon to have at this level, and it is a fun quest. However, the gnome rogue version of this quest is a little frustrating, because Onin Machammer is really hard to find (the quest says that he is in the vicinity of the Gnomeregan entrance). The spoiler: Onin Machammer is invis, up the wooden spiral watch tower. See the map inside the link for his location.