"The best proof is the fact itself," replied Heffernan, artfully.
This is why you artfully concealed her name from me until you had won my promise!
I can see that he is artfully intriguing for Mr. Wharton's favor, but I must checkmate him.
“It can be a surprise for Aunt Polly,” suggested Meg artfully.
Or, at least, I would have artfully dissembled my real sentiments.