] If he had been aware of Jane's feelings, I like to think he would have reacted more sensitively, and, I hope, refrained from meddling in his friend's love life at all!

When I read Mr Darcys letter I get a feeling that he would have meddeled anyway. He writes that Elizabeths knowledge of Janes feelings must be superior to his observations and that if his actions has caused Jane pain, Elizabeths resentment towards him "has not been unreasonable". Then he writes about the "other causes of repugnance" = the conduct of Mr and Mrs Bennet and their younger daughters. That seems to be his main objection and reason for meddling. But Mr Darcy would have had more trouble in convincing Mr Bingley that the match was unsuitable if he could not believe in Janes indifference. After all disguise of every sort is his abhorrence.