noiselessly

Noiselessly she laid the clematis and wattle on her bed, then stood near the covered face, and, looking down at her untied bootlaces, sighed an impatient sigh always well known and understood by this now unresponsive father.

1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 127

Not thirty paces behind the two she crouched--Sabor, the huge lioness--lashing her tail. Cautiously she moved a great padded paw forward, noiselessly placing it before she lifted the next. Thus she advanced; her belly low, almost touching the surface of the ground--a great cat preparing to spring upon its prey.

1912 October, Edgar Rice Burroughs, “Tarzan of the Apes”, in The All-Story, New York, N.Y.: Frank A. Munsey Co., →OCLC; republished as chapter 5, in Tarzan of the Apes, New York, N.Y.: A[lbert] L[evi] Burt Company, June 1914, →OCLC

The Bat—they called him the Bat. Like a bat he chose the night hours for his work of rapine; like a bat he struck and vanished, pouncingly, noiselessly; like a bat he never showed himself to the face of the day.

1920, Mary Roberts Rinehart, Avery Hopwood, chapter I, in The Bat: A Novel from the Play (Dell Book; 241), New York, N.Y.: Dell Publishing Company, →OCLC, page 01