By this time the whole of the Imperial army had come up, and was encamped upon a plain, between two canals, on the east of Pavia, about a league from the walls of the city, and about half a league from the advanced guard of the French army. The hostile camps were separated by the Vernacula, a small but deep river, with steep banks. The spot chosen for their camp by the Imperialists was protected by a rising ground from the French artillery, while the Vernacula served them as a trench. After carefully studying the position of the French army, Pescara became convinced that it would be impossible to force them in their intrenchments, and as all attempts to draw them forth had proved ineffectual, some new expedient must be adopted. At last he hit upon a plan, which he proposed to Bourbon. “Since all other means have failed,” he said, “I propose to proceed in this manner. The attack must be made to-night. My design is to make a breach in the walls of the park of Mirabello sufficiently large to allow the passage of our whole army. This can be readily accomplished in a few hours, and without artillery, if we are undiscovered. The walls can be battered down by rams and other engines, and while the operations are going on, false attacks must be made at two or three different points of the French camp, so as to distract their attention. Once within the park, we shall have nothing between us and the king, whose quarters are now near the Certosa. If we cannot compel him to give us battle, we can at least succour Pavia.” “I like the plan, and doubt not it will succeed,” remarked Bourbon. “But De Leyva must be informed of it, that he may hold himself in readiness to sally forth with the garrison.” “I will engage to take a message to him,” said Pomperant, who was standing by. “Tell him go make ready to-night,” said Pescara; “and when he hears cannon fired in the park to come forth with his men.” “It shall be done,” replied Pomperant. “It is well you have resolved to execute your plan without delay, for Pavia is reduced almost to the last extremity.” About an hour before midnight Pescara put his battalion in motion, and after making a wide circuit, so as to avoid the French pickets, he approached the farther side of the park of Mirabello. Del Vasto followed. Next came Castrioto, with his squadron of five hundred light horse. Then came Lannoy, with his Neapolitan soldiers. Then the Burgundian cavalry under the Comte de Salms; and lastly Bourbon, Von Frundsberg, and Marx Sittich d'Ems, with the German lanz-knechts and reiters. The night was so dark, and the movement so noiselessly executed, that no suspicion was entertained by the French.