Borrow or produce (it is immaterial, save for appearance, which you do) six to nine coins, and lay them, apart from each other, on a table or slab. Have one of the coins marked by several persons in the room (use the "no confederate" excuse), and placed along with the unmarked ones in a hat and the whole shaken up so as to be well mixed. Whilst this is being done, have yourself blindfolded. Placing your hand in the hat, feel every coin, and you will at once detect which is the marked one, by its warmth. The heat is imparted to it from the many hands through which it has passed. It is always advantageous to have the other coins lying on as cold a place as possible; but never turn back a tablecloth for the purpose of allowing them to lie on the bare mahogany, or a clue to the solution of the mystery will be given. Sometimes some clever people will pretend to put the marked shilling into the hat without doing so. This you can easily detect by counting the coins. Of course, you would not count them until you failed to find the marked one, as the trick should be performed as quickly as possible. No sleight of hand whatever is required; but it is a trick which never fails to excite the greatest wonderment whenever successfully performed. By allowing the audience to arrange the preliminaries, you disarm suspicion. The blindfolding, which is an innovation of my own, I find a great improvement. Of course, make the most of it.