David Stone (February 2013 Lecture) February 28, 2013 admin Billy Debu, Junior Champion of Magic in France with Erik Boetcker. Dan Joubert, President performing with the help of Mondo Henriques. Cyndy Weinman assists David Stone with a balloon issue. David assisted by Bill Gillespie. David is assisted by Mondo Henriques and Andy Johnson David with Simone Marron, Secretary.