Anthony is given the address that Cora left as her own with the pawnbroker, but when he goes there it turns out to be the apartment where her former fiance lives, whom she is visiting.
Anthony sees Cora's necklace in the pawnbroker's window, buys it, and learns that she left it there the day before. He should not have been able to buy it, because the item pawned remains the property of the person pawning it until the time of the loan has expired.