Definition of "sleepily"

Igins was studying the habits of a capuchin caterpillar, that, like his betters, was sleepily eating his way through existence on the leaf of a cabbage in the garden […]

1839, Launcelot Lamprey, “Mems in the Mediterranean”, in The Metropolitan Magazine, volume 24

Lettie's eyes were scarcely open, but she answered sleepily, "Well, papa."

1857 January, “To-morrow”, in The Mother's Magazine