Quietly and underhandedly they began to go back to doing the old bad things again.
"White Queen of the Cannibals: The Story of Mary Slessor"
A. J. Bueltmann
You'll do yours underhandedly.
"'Firebrand' Trevison"
Charles Alden Seltzer
And, fatally, it followed that Natacha, in that infernal intrigue, negotiated for the life of her father through the agency of a man who, underhandedly, sought to strike at the general himself, because the immediate death of her father before the negotiation was completed would enrich Natacha, who had given Michael so much to hope.
"The Secret of the Night"
Gaston Leroux