Now was the moment for her resolution to be executed, and, while her courage was high, she immediately said, 'Mr Darcy, I am a very selfish creature; and, for the sake of giving relief to my own feelings, care not how much I may be wounding yours. I can no longer help thanking you for your unexampled kindness to my poor sister. Ever since I have known it, I have been most anxious to acknowledge to you how gratefully I feel it. Were it known to the rest of my family, I should not have merely my own gratitude to express.'
'I am sorry, exceedingly sorry,' replied Darcy, in the tone of surprise and emotion, 'that you have ever been informed of what may, in a mistaken light, have given you uneasiness. I did not think Mrs Gardiner was so little to be trusted.'
'You must not blame my aunt. Lydia's thoughtlessness first betrayed to me that you had been concerned with the matter; and, of course, I could not rest till I knew the particulars.
Volume 3, Chapter 16
As far as I can make out, a few people knew Mr Darcy was involved with Mr Wickham/Lydia affair:
- Mr Gardiner
- Mrs Gardiner
- The Gardiner children
- Mr Wickham
Given that Mr Darcy knew what a thoughtless person Lydia was, why did he not suspect her?
I assume he would have known the embargo Mr Wickham placed on his new wife,
'...But gracious me! I quite forgot! I ought not to have said a word about it. I promised them so faithfully! What will Wickham say? It was to be such a secret!'
Volume 3, Chapter 9
But did Darcy think such a promise would stand with Lydia, and it was merely a gentleman's agreement for discretion between himself and the Gardiners that he thinks Mrs Gardiner broke?
Is this an example of sexism/the titular prejudice on Mr Darcy's part, or does he consider the closeness between Elizabeth and Mrs Gardiner as the reason for her suspected divulgence?