She then spoke of the letter, repeating the whole of its contents as far as they concerned George Wickham. What a stroke was this to poor Jane! who would willingly have gone through the world without believing that so much wickedness existed in the whole race of mankind, as was here collected in one individual. Nor was Darcy's vindication, though grateful to her feelings, capable of consoling her for such discovery. Most earnestly did she labour to prove the probability of error, and seek to clear one without involving the other.
The word "stroke" in the preceding sentence refers to