It had ever been the plan of Milan to weaken Florence by aiding Pisa, and to weaken Pisa by this continual war, for it was the Visconti's dream to carry their dominion into Tuscany. Now at this time, amid all these disasters, the Pisan ambassador at Milan was a certain Giovanni dell' Agnello, a merchant, ambitious but without honour. This plebeian readily lent himself to the Visconti to betray the city, if thereby he might win power; and this Visconti promised him, for, said he, "if I win Pisa, you shall be my lieutenant, and all the world will take you even for my ally." Agnello went back to Pisa full of this dream:[43] and at the first opportunity suggested that Visconti would be flattered if a Lord were to be elected in Pisa, if only for a year at a time; and in his subtilty he proposed Pietro d' Albizzo da Vico, a very much respected (_di gran stima_) citizen, as Lord. But Messer Pietro replied by asking to be sent with other citizens to Pescia to arrange the peace with Florence. Then a certain Vanni Botticella applied for the post; and Agnello praised him for his patriotism, but asked him whether he had money enough to be Lord. Certainly Pisa had fallen. By this Agnello was suspected, and indeed one night certain citizens got leave to search his house, for they believed him to be a traitor[44]. But he had warning, and already Hawkwood had sold himself, for it was his business. So, when those citizens had returned disappointed, for they found Agnello abed, he arose and joined his bandits. With Hawkwood he went to the Palazzo dei Anziani, bound the guard and had the Elders summoned, and told them a tale of how the Blessed Virgin had bidden him assume the lordship of the city. Well, he had his way, his bandits saw to that; so the Anziani agreed and swore obedience. Next day Pisa acclaimed her Doge. Agnello remained Doge, or Lord as he preferred to be called, for four years. Then Charles IV marched back over the Alps into Italy. Bought off and thwarted in Lombardy, he came towards Lucca, which the Lucchesi exiles again offered to buy from him. Agnello was terrified. In haste he sent to Charles offering to give him Lucca if he were made sure in Pisa. Outside the walls of Lucca, Charles knighted this astute tradesman. Agnello ran back to Pisa and conferred knighthood on his nephews. Then he built a platform and awaited the Emperor. His end was in keeping with his life. As he stood on the insecure "hustings" which he had built, that in sight of all the people Charles might declare him Imperial Vicar of Pisa, the platform collapsed and Agnello's leg was broken. Now, whether the comic spirit, so helpful to justice, be strong in our Pisans still, I know not, but on learning of the misfortune of their Lord, they rose, and, without noticing their Imperial Vicar, appointed Anziani to rule by the old laws.