 Fielding 's ninth play , the unsuccessful The Letter Writers Or , a New Way to Keep a Wife at Home , ran for four nights as a companion piece to The Tragedy of Tragedies but was soon after replaced by The Welsh Opera on 22 April 1731 . The play followed two characters whose wives are busy having affairs and how they attempt to keep their wives faithful . The immoral characters are forgiven within the play and there is a lack of moral commentary within the plot . 
