The goat, which had slid about during the transfer, regarded him with bright-eyed perspicacity, but made no sound.
Dick, Philip K.
Do Androids Dream of Electric Sheep?
"Sire," said Villefort, "the suddenness of this event must prove to your majesty that the issue is in the hands of Providence; what your majesty is pleased to attribute to me as profound perspicacity is simply owing to chance, and I have profited by that chance, like a good and devoted servant—that's all. Do not attribute to me more than I deserve, sire, that your majesty may never have occasion to recall the first opinion you have been pleased to form of me."
Alexandre Dumas
The Count of Monte Cristo
Very likely, with the perspicacity of her sex, she gave out as an accomplished fact what she felt was pretty sure to become a fact in a few days.
Fyodor Dostoevsky
The Idiot
II The Perspicacity of Master Scaufflaire From the town-hall he betook himself to the extremity of the town, to a Fleming named Master Scaufflaer, French Scaufflaire, who let out "horses and cabriolets as desired."
Victor Hugo
Les Misérables
...) So there he was, this peculiar and hideous youth, with an old hag who said, "I won't stand up; my corns," and then noticed that the mention of corns seemed to arouse him; whispering the secret of her eccrine-and-apocrine facility, she asked if he'd like her to imitate anyone's smells, he could describe and she could try, and by trial-and-error they could ... and at first he jerked away, No no no, but she coaxed him in her voice like crumpled paper, until because he was alone, out of the world and out of all time, alone with this impossible mythological old harridan, he began to describe odors with all the perspicacity of his miraculous nose, and Tai Bibi began to imitate his descriptions, leaving him aghast as by trial-and-error she succeeded in reproducing the body odors of his mother his aunts, oho you like that do you little sahibzada, go on, stick your nose as close as you like, you're a funny fellow for sure ... until suddenly, by accident, yes, I swear I didn't make her do it, suddenly during trial-and-error the most unspeakable fragrance on earth wafts out of the cracked wrinkled leather-ancient body, and now he can't hide what she sees, oho, little sahibzada, what have I hit on now, you don't have to tell who she is but this one is the one for sure.
Salman Rushdie
Midnight's Children: A Novel
Monsieur Rodolphe Boulanger was thirty-four; he was of brutal temperament and intelligent perspicacity, having, moreover, had much to do with women, and knowing them well.
Gustave Flaubert
Madame Bovary