Complex sentence: With the packet of letters now in his posession, he scornfully tells her she will face the guillotine for her blackmail along with her lover, yet when he opens the package he finds only blank papers.
Split into simpler sentences: With the packet of letters now in his posession, he scornfully tells her that she will face the guillotine for her blackmail, along with her lover. Yet when he opens the package he finds only blank papers.