She met the magus's stunned look with a smile. "The Thieves of Eddis have always been uncomfortable allies to the throne, Magus. There is the niggling fear that if you fall out with a Thief, he might see it as his right and responsibility to remove you. There are some checks, of course. There is only ever one Thief. They are prohibited from owning any property. Their training inevitably generates the isolation that makes them independent, but also keeps them from forming alliances that might become threats to the throne. It is not the folly you might think.