16.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.
19.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.
20.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.