I can just imagine the conversation on the hillock between Mr Darcy and Mr Bennet.
"Hallooo there Mr Bennet! I have found her!"
"You have sir?! My thanks!"
"And I want you to know sir, I wish to marry her!"
Her father surveyed the bedraggled creature next to him, before shouting back.
"She is proven trouble young man, but if you think you can manage, you have my blessings!"
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LOL, anyhow you spin it I think it is a situation made for humour.
On the note of Darcy not knowing the impact of his behaviour with Miss Cornish, yes, he was rather obtuse...But it's Mr Darcy...that is known...LOL