Fussily

adv. [f. FUSSY a. + -LY².] In a fussy manner.

1817.  Byron, Beppo, lxxiii. Who … getting but a nibble at a time, Still fussily keeps fishing on.

1864.  J. Forster, Life Sir J. Eliot, I. 114. He had to make answer by fussily quoting his own book against Bellamiine.

1883.  F. M. Peard, Contrad., I. ii. 32. They were altogether dependent upon him, and he had acted, a little fussily perhaps, but nobly.