Louis, Duc de Litran, is, to many outward appearances, a model collaborator. He can swear - before a magistrate, before the Viceroy, under a zone of truth or under torture - really, however he might ever possibly be required to swear - that he has given neither aid nor comfort to any enemies of the Crown, that he knows no enemies of the Crown, that he has enforced the Crown's laws on his duchy, and that every magistrate or official he has ever appointed has themself sworn to be a faithful Asmodean. The ability to so swear under torture will likely never come up; the ability to so swear in a zone of truth may. The viceroy is governing Galt with a light touch at the moment, but that's hardly guaranteed to last forever. And so Louis de Litran carefully cultivates his ignorance of anything that might be a problem for him to be unable to deny.
Comte Charles-Louis Aspex de Artenay, Duc Louis' eldest son, is not always quite so careful. He has a sizable income as Comte de Artenay, and a second sizable income as heir to the duchy of Litran, but while one might hesitate to call his lifestyle austere, it's certainly more restrained than one might expect from his place in the world. His servants love him, and gossip about a gambling problem that he doesn't have and a love of the arts which he does.
So great is Charles-Louis Aspex' love of the arts that sometimes he will hand out invitations to some private soirée to some person merely on their word that they are an artist - a writer, perhaps? without even asking their name or the titles of the things they have written. A man could swear, then, that he did not know who was attending his parties (Even if he could make a pretty good guess.)