Cryptogram from Pride and Prejudice, chapter 43

The housekeeper came; a respectable looking elderly woman, much less fine, and more civil, than she had any notion of finding her. They followed her into the dining-parlour. It was a large, well-proportioned room, handsomely fitted up. Elizabeth, after slightly surveying it, went to a window to enjoy its prospect. The hill, crowned with wood, from which they had descended, receiving increased abruptness from the distance, was a beautiful object. Every disposition of the ground was good; and she looked on the whole scene, the river, the trees scattered on its banks, and the winding of the valley, as far as she could trace it, with delight. As they passed into other rooms, these objects were taking different positions; but from every window there were beauties to be seen. The rooms were lofty and handsome, and their furniture suitable to the fortune of their proprietor; but Elizabeth saw, with admiration of his taste, that it was neither gaudy nor uselessly fine, - with less of splendour, and more real elegance, than the furniture of Rosings.

The sentence you are solving goes here.

This was a lucky recollection - it saved her from something like regret.