Looking for story where Darcy Elizabeth are abducted

I'm looking for a story where Darcy, Elizabeth, Miss Bingley and Mrs. Hurst are traveling by carriage and are stopped by thieves. Their belongings are stolen and Elizabeth and Darcy are abducted and held for ransom. Elizabeth and Darcy pretend to be married, and eventually the leader of the gang lets them out. There's a trial for the criminals and Darcy arranges for the leader to be shipped to America. I think the epilogue of the story has the Darcy's son meet the daughter of the criminal leader, who he named Elizabeth in honor of the one he had admired before.

Can anyone help me find this story?