To locate within moments the card selected by a spectator and put back by him anywhere in the deck.

Props: a deck of cards, soft pencil

Adv. Pre: Square up the deck and draw 3-4 lines on one side of it with a pencil as shown in figure.

Spread the deck on the table in such a way that the marked side of each card should remain covered with the card above it.

Call a spectator and ask him to select any card from the deck. Let him have a look at it and let a few other spectators also see the card. In the meantime you gather the rest of the deck, square up and turn it around in your hands. Keep the marked side covered with your fingers.

Now tell the spectator to insert the card in the deck wherever he wishes. Make sure that he is putting it back in the same position with which he has lifted it without turning it around, otherwise you will have to give a second complete turn to your deck.

Turn you back for a while and glance at the marked side. On one place you will find the pencil lines broken and on the other side there will be some black dots.

This is the card selected by the spectator which you withdraw from the deck and produce it to  surprise your audience.