Honestly, I have not been able to trace the author of this principle, which I think is lost in the mists of time. My Master of Mentalism Valerio Bovolenta taught me, and I want to give credit to him. I have done nothing but study it and try to indicate a method to be able to propose it with any number of cards.
The procedure is very simple: the spectator chooses how many cards he wants to use, puts away the remaining cards (they will not be used further), shuffles the cards he chose and, on the instruction of the performer, chooses a number, looks at a card, and reassembles the deck; even without knowing the position of the card, the performer will find it. The effect can be replicated immediately, with a greater or lesser number of cards.
The method is described for any number of cards, with a table clearly indicating how to make the counts.
Two versions are presented, the first to be performed over the phone, with the opportunity, in fact, to repeat the effect immediately; the second version was prepared for a "close-up" presentation, using the Major Arcana of the Tarot and thus obtaining a slightly more "mysterious" climax; if, on the other hand, it is proposed with a borrowed deck, it is introduced by talking about Tarots and it is explained that even using a normal deck, one does nothing but use the Minor Arcana.
1st edition 2021, PDF 9 pages.
word count: 1979 which is equivalent to 7 standard pages of text