I can be as secret as the wiliest Oriental of them all.
"The Lamp in the Desert"
Ethel M. Dell
"Tell us more;" begged Emily, looking up with an expression none of her admirers ever brought to her face by their softest compliments or wiliest gossip.
"Kitty's Class Day And Other Stories"
Louisa M. Alcott
He'd killed the wiliest game with his own hands.
"Duel on Syrtis"
Poul William Anderson