Card Tricks Revealed - THE CARD FOUND AT THE SECOND GUESS

Offer the cards to any one, and let him draw one. You then hold the cards behind your back, and tell him to place his card on the top.
Pretend to make a great shuffling, but only turn that card with its back to the others, still keeping it at the top.
Then hold up the cards with their faces towards the spectator, and ask him if the bottom card is his.
While doing so, you inspect his card at your leisure.
He of course denies it, and you begin shuffling again furiously.
“Let me do that,” he will probably say; so, as you are perfectly acquainted with his card, you let him shuffle as much as he likes, and then, when you get the cards back again, shuffle until his card is at the bottom.
Then pass them behind your back, make a ruffling noise with them, and show him his own card at the bottom.

Excerpt from the book:
EVERY BOY’S BOOK: A COMPLETE ENCYCLOPÆDIA OF SPORTS AND AMUSEMENTS.
EDITED BY EDMUND ROUTLEDGE.
With more than Six Hundred Illustrations
FROM ORIGINAL DESIGNS.
LONDON: GEORGE ROUTLEDGE AND SONS,
THE BROADWAY, LUDGATE.
NEW YORK: 416, BROOME STREET.
1869.