Despite these travails, Pallavicino continued his satiric attacks on the Pope. In the 18 months following the publication of "Il Corriero", he wrote four more books. In 1642 appeared his "Baccinata ouero battarella per le api barberine", a "Drumming against the Barberini bees, on the occasion of Our Lord Pope Urban the Eighth taking up arms against Parma" in the First War of Castro against Odoardo Farnese, duke of Parma and Castro. It was the country folk's practice to make a racket on pots and pans ("baccinata") in order to disperse a swarm of bees — the heraldic emblem of the Barberini — that were settling in an undesirable place. The "Baccinata" took the form of a letter to Francesco Vitelli, papal nuncio at Venice, comparing the papal actions unfavourably with those of Christ: