Scarlett turned away from Mammy with studied nonchalance, thankful that her face had been unnoticed in Mammy's preoccupation with the matter of the shawl.
Authority likes to feel that a man is imposing some effort on himself, and that his apparent nonchalance is only a cloak to disguise an outfit of well-bred emotions.
A certain superciliousness of look, coolness of manner, nonchalance of tone, express fully their sentiments on the point, without committing them by any positive rudeness in word or deed.