Lane sat up a bit in his chair and adjusted his expression from that of all-round apprehension and discontent to that of a man whose date has merely gone to the John, leaving him, as dates do, with nothing to do in the meantime but smoke and look bored, preferably attractively bored.
There are no more uses of "contented" in the book.
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She grew more contented with age.
It’s hard to get her to consider a change because she is so contented with the way things are.