Berete and the Duke are extremely well dressed - the latter obviously more so, but a duke's housekeeper is still a step above most people, and clearly he either pays her very well or considers it important to outfit her like he does.

They arrive in Chiyavio after a few hours, but it's a little longer before they stop at the duke's house.

The duke has a stupidly huge house.

He leaves the carriage with a dismissive, "Put her somewhere," over his shoulder.

"Yes, your grace," says Berete, although he is gone before she finishes saying it. "Hungry, Ayabel? I believe the kitchen counts as 'somewhere'."