For those who are interested, the 'Magician vs. Gambler' premise is sometimes credited to Fred Braue. It can be found in the Hugard Annual For 1937, page 43. However, the earliest source of this effect has never been ascertained.
As Karl Fulves points out in The Pallbearers Review Close-Up Folio #9, the Dai Vernon issue (Part Three), "Adding to the confusion is the fact that the 'Magician Makes Good' premise seems to have become absorbed into the 'Magician vs. Gambler' plot." Fulves continues by saying "An excellent example on just this point can be found in Wilfrid Jonson's brilliant book, But Not To Play. Describing a trick called 'Four of a Kind,' he says the original idea came from Nate Leipzig. You would expect him to describe the 'Magician Makes Good' plot, but instead Jonson describes the 'Magician vs. Gambler' effect, accompanied by a different presentation angle."
The aforementioned Fulves comments appeared in the context of a discussion of the history of Vernons 'Travelers' effect.
[ November 08, 2001: Message edited by: Harvey Rosenthal ]