"You go and fetch her down, Tom," said Mr. Tulliver, rather sharply,—his perspicacity or his fatherly fondness for Maggie making him suspect that the lad had been hard upon "the little un," else she would never have left his side.
There are no more uses of "perspicacity" in the book.
Show samples from other sources
Such legislation would require perspicacity all too rare in the congress.
He had come to look on her perspicacity in this matter as a sort of second sight.
Wodehouse, Pelham Grenville -- The Man Upstairs and Other Stories