With almost a serene deportment, therefore, Hester Prynne passed through this portion of her ordeal, and came to a sort of scaffold, at the western extremity of the market-place.
There he used to sit, gazing with a somewhat dim serenity of aspect at the figures that came and went, amid the rustle of papers, the administering of oaths, the discussion of business, and the casual talk of the office; all which sounds and circumstances seemed but indistinctly to impress his senses, and hardly to make their way into his inner sphere of contemplation.
There are no more uses of "serene" in the book.
Show samples from other sources
While I lie awake worrying, she sleeps serenely.
She remained serene even when he was yelling at her.