Murmuring scholarly pleasantries, a pride of art professors and museum officials gathered amidst the grainy oak paneling and ostentatiously plain furniture of Manhattan's Harvard Club, only to find the place set with traps. For cocktail-hour amusement before a dinner of the Friends of Harvard's Fogg Museum, the Fogg's director, tweedy John P. Coolidge of the Boston Coolidges, had arranged a jolly academic jape: the walls were hung with forged art—or was it all forged?
One of the first items in the quiz was a Crivelli Pieta, and the trick was to tell what part was original and what part had been...