It was 100 years ago today that Dai Vernon fooled Houdini with his Ambitious Card at an S.A.M. banquet at the Grand National Hotel in Chicago. To mark the occasion, here's video of The Professor himself doing that very trick. This is from a 1976 Canadian show, Celebrity Revue, hosted by Carol Taylor and Peter Pit.
Vernon did the trick for Houdini seven times and, it's my understand, varied his method each time. He would forever pride himself on being "The Man Who Fooled Houdini." Vernon's own mementos from that night sold last year at a Potter & Potter auction, including the group photo below.
What I'd love to know is what happened to the signed four of diamonds?