But to say he couldn't was so sneakingly good that I don't believe it of him.
"Phemie Frost's Experiences"
Ann S. Stephens
That Jerry mule, hatin' me an' allowin' to make me all the grief he can, sneakingly leaves the trail some'ers after I turns him an' touches him up with the lash.
"Wolfville Nights"
Alfred Lewis
If he who struck him, though he did so sneakingly and treacherously, had drawn his sword and stood and faced him, then he who had been struck would have received offence and insult at the same time; offence because he was struck treacherously, insult because he who struck him maintained what he had done, standing his ground without taking to flight.
"The History of Don Quixote, Volume II., Complete"
Miguel de Cervantes Saavedra