I just noticed this. At the end of ch.43, we are told:

...as they were now approaching the scene of [Mrs. Gardiner's] former pleasures, every idea gave way to the charm of recollection; and she was too much engaged in pointing out to her husband all the interesting spots in its environs to think of anything else. Fatigued as she had been by the morning's walk, they had no sooner dined than she set off again in quest of her former acquaintance, and the evening was spent in the satisfactions of an intercourse renewed after many years discontinuance."