I am reading Entertaining Mr Sloane by Joe Orton. I was wondering what does he mean when he says:
"Sloane: I was brought up in an orphanage.
Kath: You have the air of lost wealth.
Sloane: That's remarkable."
When one "has the air" of something he possesses certain characteristics or behaviors which are commonly associated with that something. So Kath is saying that Sloane seems to be an aristocrat who has "fallen from grace."