Adept as she was, in all the arts of cunning and dissimulation, the girl Nancy could not wholly conceal the effect which the knowledge of the step she had taken, wrought upon her mind.
One fully skilled or well versed in anything; a proficient
When he had achieved this task, he applied himself to the acquisition of stable language, in which he soon became such an adept, that he would perch outside my window and drive imaginary horses with great skill, all day.