My grandfather had a drawer that contained 153 (or it may have been 157) decks of playing cards. Some marked, some 'brailled', some shaved, some closed but previously opened and stacked in certain ways, some with certain cards shaved, some just normal, etc. That man was a master at card tricks, and he was also one helluva bridge player. He could recall every card that was played and by whom. Of course, for a man who spoke about twelve languages (he didn't, but he had me convinced he did), a man who met Thomas Crapper, William Shakespeare, Sir Walter Ralegh, Thomas Edison, Guglielmo Marconi, Elizabeth I and II, various members of the Han Dynasty and John the Baptist, remembering 52 cards was not even a mild mental workout for him. I don't know that he was strange, but he sure was different.