In Turin he was befriended by presidents Catto and Birago. The latter concealed him in one of his own houses on the banks of the Po. He had friends, kept up party affiliations, and hoped that the recent death of the English monarch would occasion a war in Italy. In other letters, addressed to his wife Alessandra, he alludes to his hope of French interference and expresses an intention of returning to that court. He gives her advice for the management of domestic affairs and recommends her to Nicolò Doria, Antonio De Fornari and Giovanni Gerolamo Salvago. There is a letter to count Gerolamo Fieschi in which he asks a hundred crowns and letters of recommendations to the king of France, Delfino, the admiral and the cardinals Tornone and Ferrara. He exhorts the count to be diligent in furnishing his fortresses and to put on a bold front in order to discourage his enemies and inspirit his friends. The records of the trial show that the Ferrero gave these letters to the senate. The most important of these epistles is the one written in July to Pietro Francesco Grimaldi Robio, doctor of the college of judges, in which he exculpates himself from the charge made by Verrina of having been the first instigator of the conspiracy. He shows that Verrina had been the beginning, middle and end of the plot. He says that if Calcagno were alive, he would fully exculpate him from the accusations; but as this person was dead it only remained for him to recite all the facts of the conspiracy. This history he says will show him to have been innocent. His only fault was that he had been born in Savona. Had he been a Genoese he would have communicated his first knowledge of the plot to the senate and thus escaped condemnation, or be as lightly punished as many of his present accusers. He admits that he concealed the conspiracy but asks: “Ought I to have denounced the count, my master and exposed him to death and infamy? If this silence is a fault, I do not hesitate to accept the responsibility of it, I have already written to the Doge and I repeat, that if the senate will send to Turin a person in whom they have confidence I will recite the whole story of the plot. I do not say this to beg pardon for what I have done, but to disprove unjust charges heaped upon my name.” These are the customary phrases of informers. These papers show that Sacco was not involved in the condemnation of his accomplices. For the rest, we are not permitted to know what was the nature of his revelations, because the most important papers of this trial are wanting. We believe, however, that some mutilated documents refer to this matter. We learn from them that a certain Filippo di Graveggia carried letters under the saddle of a mule to Parma, Bologna and other cities.