Meanwhile Hildebrand secretly sent swift riders to Apulia, calling on Robert Guiscard for help, and still the nobles were faithful to him, and though Henry held the bridges, they were strong in Trastevere and the Borgo, which is the region between the Castle of Sant' Angelo and Saint Peter's. So it turned out that when Henry tried to bring his Antipope in solemn procession to enthrone him in the Pontifical chair, on Easter day, he found mailed knights and footmen waiting for him, and had to fight his way to the Vatican, and forty of his men were killed and wounded in the fray, while the armed nobles lost not one. Yet he reached the Vatican at last, and there he was crowned by the false Pope he had made, with the crown of the Holy Roman Empire. The chronicler apologizes for calling him an emperor at all. Then he set to work to destroy the dwellings of the faithful nobles, and laid siege to the wonderful Septizonium of Severus, in which the true Pope's nephew had fortified himself, and began to batter it down with catapults and battering-rams. Presently came the message of vengeance, brought by one man outriding a host, while the rabble were still building a great wall to encircle Sant' Angelo and starve Hildebrand to death or submission, working day and night like madmen, tearing down everything at hand to pile the great stones one upon another. Swiftly came the terrible Norman from the south, with his six thousand horse, Normans and Saracens, and thirty thousand foot, forcing his march and hungry for the Emperor. But Henry fled, making pretext of great affairs in Lombardy, promising great and wonderful gifts to the Roman rabble, and entrusting to their care his imperial city. Like a destroying whirlwind of fire and steel Robert swept on to the gates and into Rome, burning and slaying as he rode, and sparing neither man, nor woman, nor child, till the red blood ran in rivers between walls of yellow flame. And he took Hildebrand from Sant' Angelo, and brought him back to the Lateran through the reeking ruins of the city in grim and fearful triumph of carnage and destruction. That was the end of the Roman Forum, and afterwards, when the blood-soaked ashes and heaps of red-hot rubbish had sunk down and hardened to a level surface, the place where the shepherd fathers of Alba Longa had pastured their flocks was called the Campo Vaccino, the Cattle Field, because it was turned into the market for beeves, and rows of trees were planted, and on one side there was a walk where ropes were made, even to our own time.