Bates, deprived of her usual employment, slumbering on one side of the fire, Frank Churchill, at a table near her, most deedily
occupied about her spectacles, and Jane Fairfax, standing with her back to them, intent on her pianoforte.
Next day, when Emma visits Miss Bates to hear the piano, she and her companions catch Frank almost alone with Jane: he "most deedily
occupied" in mending spectacles, and she "standing with her back to them, intent on her pianoforte" (240).
the adverb deedily
, re-used in Emma; after her, it shows up only in an 1859 academic treatise.