Devil's Island by Mark Leveridge
This lightweight mental effect is suitable for close up, parlor or even stage and is very simple to do. A map is shown which has six named locations marked on it. A spectator mentally selects one and records his choice on a small card which is concealed in an envelope. Cards bearing the names of the six locations are shuffled by a spectator and placed by him entirely at random into six envelopes which are then given out to audience members. Despite all this, a prediction shown at the start leads to the correct person holding the envelope which contains the spectator's chosen island location.
This lightweight mental effect is suitable for close up, parlor or even stage and is very simple to do. A map is shown which has six named locations marked on it. A spectator mentally selects one and records his choice on a small card which is concealed in an envelope. Cards bearing the names of the six locations are shuffled by a spectator and placed by him entirely at random into six envelopes which are then given out to audience members. Despite all this, a prediction shown at the start leads to the correct person holding the envelope which contains the spectator's chosen island location.