In the very next year a more bitter fate was Provenzano's own. With Florentine aid, the Guelf exiles were threatening the Sienese frontier, and Provenzano Salvani, with Count Guido Novello, led a mixed force of Tuscan Ghibellines and Spanish and German mercenaries to attack Colle di Val d'Elsa. Here, in June 1269, they were surprised by a smaller force of French cavalry under Guy de Montfort, "routed and rolled back in the bitter paces of flight," the Florentines and Guelf exiles taking ample vengeance for the slaughter of Montaperti. More than a thousand Sienese fell. Provenzano himself, to whom before the battle it had been foretold that his head should be the highest in the field, was taken prisoner, and murdered in cold blood by Cavolino Tolomei, who rode through the host with his head upon the point of his lance. Among the Guelf exiles in Colle was a noble lady named Sapia--the wife, it is said, of Ghinibaldo Saracini--who waited in agonised suspense in a tower near the field, declaring that she would hurl herself down from the window if her countrymen were victorious. When she saw them routed, and watched the furious Guelf pursuit, she broke out into the paroxysm of delight recorded by Dante, "crying to God, Henceforth I fear thee no more."[8] The battle of Colle di Val d'Elsa closes the period of Ghibelline supremacy in Siena. In the following year Guy de Montfort, as vicar of King Charles, forced the Sienese to take back their Guelf exiles, who soon drove out the Ghibellines. Instead of the Twenty-four, the chief power was now vested in a Thirty-six, who included both nobles and _popolani_. The long struggle with Florence was over for the present, Siena being forced to join her rival in the Guelf League under the suzerainty of the Angevin king. And as was inevitable when the Guelfs got the upper hand in an Italian state, in 1280 the nobles, or _gentiluomini_, were excluded from the Government, which was now put into the hands of the "Fifteen Governors and Defenders of the Commune and People of Siena." A daring, but unsuccessful attempt of the Ghibelline exiles and their adherents within the walls to recapture the city in 1281 only resulted in strengthening the new democratic government. In 1285 the Fifteen were reduced to Nine, the famous magistracy of the _Signori Nove_, "the Lords Nine, the Defenders of the Commune and People of the city and district of Siena, and of the jurisdiction of the same," in which no members of noble houses could sit (though still eligible for the other offices of the State, such as those of the Provveditori di Biccherna). Their term of office was two months, during which they lived at the expense of the State in one or other of the palaces of the city, rented for the purpose, until the present Palazzo Pubblico was built. The Nine were chosen from the _popolo di mezzo_, the rich and enlightened merchant class, that came between the nobles and the plebeians. Throughout the story of Siena we find the word