Though you're right that Match de prestidigitation was long assumed lost, I'm afraid I have to disagree with you on the categorization rationale; since the film's no longer lost, it seems misleading to include it in that category. Creating a new category, called "Recovered films" or "Films previously assumed lost" or similar, might be the best option.--Lemuellio (talk) 14:00, 14 October 2016 (UTC)
Agreeing that a new category is due (yet hesitant, knowing a fair amount of recategorization now lay ahead), I've created Rediscovered films and placed A Wager Between Two Magicians, or Jealous of Myself therein.—Swmmng (talk) 15:15, 14 October 2016 (UTC)
