Extra Sensory Perception by Mark Strivings - Trick

Back in The Jinx and subsequently in "Annemann's Practical Mental Effects", Theo Annemann published an absolutely fabulous idea. It was a devious and incredibly simple design duplication. I first came across it back in the mid-80's. But there's just one problem. As published, I haveyet to find anyone who could actually make it work.I suspect that has more to do with the way that materials have changed since the days of Annemann than anything else. The 'secret' was that you had to be able to write in pencil directly onto a slate and not have the writing be visible. This allowed for a secret crib sheet that only the performer could see but the audience couldn't, that was brilliantly hidden in plain sight.Sadly, over the years I have tried numerous times to make this work with no luck. It doesn't seem to matter what kind of pencil/slate combination that I use, the writing is always visible. And then back around 1989 or so the idea hit me, "If I can't hide the writing, why not make a huge