Behind the scenesEdit
It is a reference to the movie, The Black Shield of Falworth. It is the reference to the coat of arms belonging to the family of Myles Falworth (a black shield with a red gryphon).
Issur will respond to inquiries about the "black shield", but not to "Falworth".
Some have interpreted Falworth to be a region of Gloriana, but there is no evidence of this. Instead it seems to be a rather straight foreward reference to the movie of the same name.