Could someone give me a quick synopsis of the effect? And a reference.
A synopsis, Roy's effect is basically what you already mentioned. But, after the 'joke' phase, the named card really DOES appear between the sandwich cards in the centre of the deck!
A reference, you'll find Roy's full description on page 175
of The Complete Walton Volume One
, which is a bound collection of his earlier works.
For the record, the original
booklet containing the effect was called - That Certain Something
[ February 17, 2002: Message edited by: Richard James ]