chunk: When she and Lord Goring confront each other, Mrs. Cheveley makes a proposal. Claiming to still love Goring from their early days of courtship, she offers to exchange Sir Robert's letter for her old beau's hand in marriage. Lord Goring declines, accusing her of defiling love by reducing courtship to a vulgar transaction and ruining the Chilterns' marriage. He then springs his trap. Removing the diamond brooch from his desk drawer, he binds it to Cheveley's wrist with a hidden device. Goring then reveals how the item came into her possession. Apparently Mrs. Cheveley stole it from his cousin, Mary Berkshire, years ago. To avoid arrest, Cheveley must trade the incriminating letter for her release from the bejewelled handcuff. After Goring obtains and burns the letter, however, Mrs. Cheveley steals Lady Chiltern's note from his desk. Vengefully she plans to send it to Sir Robert misconstrued as a love letter addressed to the dandified lord. Mrs. Cheveley exits the house in triumph.