...Miss Bingley is becoming desperately impatient that Darcy has not shown any interest in her personally? At Pemberley her jealousy would not be eased by Lizzy's sudden presence. Caroline makes many unpleasant remarks about Lizzy to the Darcys but I wonder if this is her jealousy and anger that Darcy simply admired Lizzy that prodded C. into her criticsms. It seems fair to say Caroline while clinging at a straw of hope, is working herself into a desperation of nervous impatience about Darcy. Marriages in Regency times were often not based on love between monied families. (C. wouldn't understand this really means 'Old Money.') This practise with the close friendship between Darcy and Charles appear Caroline's only hopes of a marriage with Darcy. But he's never shown any interest in suggesting their union. Caroline may be swinging into a fervour of impetuosity shown by her increasingly reckless remarks about Lizzy. Maybe for Caroline, Lizzy is a point of anger as she sees Lizzy as a hinderence for Darcy to make her a proposal.