Simply lift up the cards with the faces towards you and look for your memorized card, the nine of spades. When you find the nine of spades, the card underneath it will be the spectator’s card, in this case, the ace of spades.
Note that if you find your card, the nine of spades on the bottom of the deck, the spectator’s card is now on top of the deck. The cutting separated the cards, which will occur occasionally, but because of the cards’ locations, you still can determine the spectator’s card.
