Passage: When William Pinkerton (by then president of the Pinkerton Detective Agency) visited the place in 1873, Worth recognized him. Later the Paris police raided the place numerous times, and Worth and the Bullards decided to abandon the restaurant. Worth used his place for the last time to defraud a diamond dealer, and the three moved to London.

Question: Who was taken advantage of by Worth before he moved to London?
a diamond dealer