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David Frederick Wingfield Verner, better known by his stage names Dai Vernon or The Professor, was a Canadian magician. Vernon's sleight of hand technique and knowledge, particularly with card tricks and close-up magic, garnered him respect among fellow magicians, and he was a mentor to them. From 1963, he worked at and lived out his last decades at the Magic Castle, an exclusive specialty nightclub in Hollywood, Los Angeles, California. Vernon retired officially from performing in 1990 at the age of 96.