chunk: Terrified that he is now undone, the Mayor pleads with Khlestakov not to have him arrested, only to learn that the latter has become engaged to his daughter. At which point Khlestakov announces that he is returning to St. Petersburg, having been persuaded by his valet Osip that it is too dangerous to continue the charade any longer.
  After Khlestakov and Osip depart on a coach driven by the village's fastest horses, the Mayor's friends all arrive to congratulate him. Certain that he now has the upper hand, he summons the merchants, boasting of his daughter's engagement and vowing to squeeze them for every kopeck they are worth. However, the Postmaster suddenly arrives carrying an intercepted letter which reveals Khlestakov's true identityâand his mocking opinion of them all.