what does mr. wickham confide to elizabeth about mr. darcey?

Mr. Wickham tries to convince Elizabeth that Mr. Darcy took away a promise that Darcy's father had made. The promise was that Wickham would become a preacher and would receive a salary that old Mr. Darcy would fun. Old Mr. Darcy died, and this "promise" did not happen. In fact, Wickham is not worthy of any such bestowal of position and money; he is not a nice person and even tries to seduce Ms. Darcy to ensure his financial future.