He ventured among them again, however, though his spirits certainly did not seem fit for the mirth of the party in general.
He had spent his whole solitary evening in the room adjoining theirs; had heard voices, mirth continually; thought they must be a most delightful set of people, longed to be with them, but certainly without the smallest suspicion of his possessing the shadow of a right to introduce himself.
There are no more uses of "mirth" in the book.
Show samples from other sources
It was an evening of many stories and great mirth.
He felt no mirth or humor and wondered if there’d ever be a time again when he would.