These dispositions were scarcely made when d’Aubigny, having passed the Volturno, approached to lay siege to Capua, and invested the town on both sides of the river. Scarcely were the French encamped before the ramparts than they began to set up their batteries, which were soon in play, much to the terror of the besieged, who, poor creatures, were almost all strangers to the town, and had fled thither from every side, expecting to find protection beneath the walls. So, although bravely repulsed by Fabrizio Colonna, the French, from the moment of their first assault, inspired so great and blind a terror that everyone began to talk of opening the gates, and it was only with great difficulty that Calonna made this multitude understand that at least they ought to reap some benefit from the check the besiegers had received and obtain good terms of capitulation. When he had brought them round to his view, he sent out to demand a parley with d’Aubigny, and a conference was fixed for the next day but one, in which they were to treat of the surrender of the town.
But this was not Caesar Borgia’s idea at all: he had stayed behind to confer with the pope, and had joined the French army with some of his troops on the very day on which the conference had been arranged for two days later: and a capitulation of any nature would rob him of his share of the booty and the promise of such pleasure as would come from the capture of a city so rich and populous as Capua. So he opened up negotiations on his own account with a captain who was on guard at one of the gates such negotiations, made with cunning supported by bribery, proved as usual more prompt and efficacious than any others. At the very moment when Fabrizio Colonna in a fortified outpost was discussing the conditions of capitulation with the French captains, suddenly great cries of distress were heard. These were caused by Borgia, who without a word to anyone had entered the town with his faithful army from Romagna, and was beginning to cut the throats of the garrison, which had naturally somewhat relaxed their vigilance in the belief that the capitulation was all but signed. The French, when they saw that the town was half taken, rushed on the gates with such impetuosity that the besieged did not even attempt to defend themselves any longer, and forced their way into Capua by three separate sides: nothing more could be done then to stop the issue. Butchery and pillage had