In Ch 5, one of the first indications on Mr. Darcy's true character was revealed in the following passage:

"......"Miss Bingley told me," said Jane, "that he never speaks much, unless among his intimate acquaintance. With them he is remarkably agreeable." In the next sentence, this declaration is dismissed. Clear up to the conclusion of the matter people still do not quite believe anything said that is good regarding Mr. Darcy's true character, with the exception of Elizabeth. Indeed Mr. Darcy's true character is uncovered in increments throughout the story by what others say about him. He says very little about himself and unfolds his own character by his deeds. Miss Austen makes masterful use of testimonials in developing Mr. Darcy's true character, giving the reader a wonderful window on Darcy that the book's characters do not see or do not wish to believe.