It is the duty of the police to maintain law and order.
Cade selected a bay mare for her and then reluctantly surrendered the duty of saddling.
The doctor who attended Pierre and visited him every day, though he considered it his duty as a doctor to pose as a man whose every moment was of value to suffering humanity, would sit for hours with Pierre telling him his favorite anecdotes and his observations on the characters of his patients in general, and especially of the ladies.