 The tenth play and new companion piece to The Tragedy of Tragedies , The Welsh Opera , ran many times until it was expanded into The Grub @-@ Street Opera . The expanded version of the play , The Grub @-@ Street Opera , was not put on for an audience , which provoked E. Rayner to print The Welsh Opera without Fielding 's consent . The play serves both as a tribute to the Scriblerians , especially Gay and Gay 's The Beggar 's Opera , and to put forth a political allegory that satirises Walpole 's government and the British monarchy . In particular , it mocked the feud between Walpole and Pulteney , a Privy Councillor . 
