Definition of "contentedly"

Some confounded fact we men have been living contentedly with ever since the day of creation would start up and knock the whole thing over.

1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], part I, page 202

“ […] This is Mr. Churchill, who, as you are aware, is good enough to come to us for his diaconate, and, as we hope, for much longer; and being a gentleman of independent means, he declines to take any payment.” Saying this Walden rubbed his hands together and smiled contentedly.

1918, W[illiam] B[abington] Maxwell, chapter VII, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company