] Kathleen, I'm unsure of the passage your'e reading from

This is the passage Kathleen was referring to:

Not a syllable had ever reached [Miss Bingley] of Miss Darcy's meditated elopement. To no creature had it been revealed, where secresy was possible, except to Elizabeth; and from all Bingley's connexions her brother was particularly anxious to conceal it, from that very wish which Elizabeth had long ago attributed to him, of their becoming hereafter her own. He had certainly formed such a plan, and without meaning that it should effect his endeavour to separate him from Miss Bennet, it is probable that it might add something to his lively concern for the welfare of his friend.

It is also the passage I was hinting at in our previous discussion. The narrator does confirm that Darcy had hopes for his sister and Bingley. Apparently, even if Darcy was concerned about Caroline's influence, that concern was outweighed by the advantages of such a match.