I am looking for the originator of an effect;
The spectator selects one card from fifteen random cards and remembers it. The card is returned to the packet and the packet is shuffled. The magician deals them to three heaps and shows each faces of the packets to the spectator. Asking the spectator which pile contains his selection, the magician compiles them with the packet that contains the selection in the center. He repeats this procedure three times. After all, he deals the cards from top one by one on the table like a carpet, keeps the selection utilizing a magician's choices and reveals it.
I know this is one of well-known mathematical card effect from many years ago, but I don't know the resources of it.
Does anyone know who is the originator of that effect?

Thanks in advance

Takenaka-san, if you are a member of my card magic site, you can read a Gergone trick in the January issue of Card Magic Monthly. Gergone is famous with that trick. You can refer about this at the following url.

http://www.cut-the-knot.com/Curriculum/M......ic.shtml

Hideo Kato.

Kato-san, Thank you for replying.
I have checked your monthly magazine and have read about Gergone trick. Reading that article, I believe Mr. Gergone is not the originator of the effect. Is the originator not obvious in the history?

By the way, Kato-san, you are right. I am a member of your web site. I am very glad to meet you here.

This sounds like the 21-Card Trick. This is as old as the hills. If there are only 15 cards in play this must be a variation of it. More then a few people have done variations of this theme including Ed Marlo and Chris Kenner.

I ordered Rouse Ball's book, and I believe I can report more if I can find any.

Hideo Kato

P.S.
Takenaka-san, please don't forget your renewal! (This is a joke).