deedily

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.

As I sat there watching that old play David plucked my sleeve to ask what I was looking at so deedily; and when I told him he ran eagerly to the window, but he reached it just too late to see the lady who was to become his mother.

the adverb deedily, re-used in Emma; after her, it shows up only in an 1859 academic treatise.

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).