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interrogation strategy
The gimmick is easy to use and doesn't have any fragile moving parts or magnets
- Bob Gill
If book tests are your thing
transposition
Roughing Sticks by Harry Robson and Vanishing Inc. - Trick 3 Fly interrogation strategyThirty years of research from Harry Robson has led to the exact formula of what we now present: the Roughing Stick. This is a stick of a hard substance and what it does is simply incredible. When you rub the surface of the stick against a card, it will act as roughing fluid does, only better. The cards stay together in roughed pairs, yet are more easily separated without fumbling whenever you want. The stick leaves NO RESIDUE, and with the roughing
