Once more, early in 1378, did Catherine go to Florence to labour in the cause of peace. She addressed the Signoria in a solemn meeting in the Palazzo Vecchio, and induced them to meet the Pope half way by respecting the interdict. "The dawn is come at last," she cried exultingly: _l'aurora è venuta_. And she prevailed upon the captains of the Parte Guelfa to offer a firm resistance to the war policy of the Eight, while endeavouring, through Stefano Maconi, to prevent them from abusing the power that their right of "admonishing" put into their hands. She was still in Florence when Gregory died, and the Archbishop of Bari, Bartolommeo Prignani, was elected Pope amidst the furious clamours of the Roman populace, as Urban VI. To him Catherine wrote at once, in the same way as she had done to Gregory, urging him to check the corruption and wickedness of the clergy, to make good Cardinals, to receive the Florentines back into the fold of the Church, and above all (for she knew something of the character of the man with whom she had now to deal) to take his stand upon true and perfect Charity.[36] A few weeks later the terrible rising of the populace, known as the Tumult of the Ciompi, burst over Florence. The adherents of St Catherine, as associated with the hated Parte Guelfa, were specially obnoxious to the mob, and her own life was threatened. A band of armed men came into the garden where she knelt in prayer, crying out that they would cut her to pieces. She prepared for martyrdom as for a joyous feast, and wept bitterly when she was left unharmed, declaring that the multitude of her sins had prevented her from being suffered to shed her blood for Christ. She wrote in this strain to Frate Raimondo, saying that she would begin a new life that day, in order that these sins of hers might no longer withdraw her from the grace of martyrdom; her only fear was lest what had happened might in some way influence the Pope against a speedy peace.[37] At the end of July peace was signed; Florence and the other cities of Tuscany were to be reconciled to the Holy See, and Catherine returned to Siena. "Oh, dearest children," she wrote, "God has heard the cry and the voice of His servants, that for so long a time have cried out in His sight, and the wailing that for so long they have raised over their children dead. Now are they risen again; from death are they come to life, and from blindness to light. Oh, dearest children, the lame walk and the deaf hear, the blind eye sees, and the dumb speak, crying with loudest voice: Peace, peace, peace! with great gladness, seeing those children returning to the obedience and favour of the father, and their minds pacified. And, even as persons who now begin to see, they say: Thanks be to Thee, Lord, who hast reconciled us with our holy Father. Now is the Lamb called holy, the sweet Christ on earth, where before he was called heretic and patarin. Now do they accept him as father, where hitherto they rejected him.