We know how intense had been the solicitude of the Prince, not only to secure but to destroy these citadels, "nests of tyranny," which had been built by despots to crush, not protect, the towns at their feet. These precautions had been neglected, and the consequences were displaying themselves, for the castle of Namur was not the only one of which Don John felt himself secure. Although the Duke of Aerschot seemed so very much his humble servant, the Governor did not trust him, and wished to see the citadel of Antwerp in more unquestionable keeping. He had therefore withdrawn, not only the Duke, but his son, the Prince of Chimay, commander of the castle in his father's absence, from that important post, and insisted upon their accompanying him to Namur. So gallant a courtier as Aerschot could hardly refuse to pay his homage to so illustrious a princess as Margaret of Valois, while during the absence of the Duke and Prince the keys of Antwerp-citadel had been, at the command of Don John, placed in the keeping of the Seigneur de Treslong, an unscrupulous and devoted royalist. The celebrated Colonel Van Ende, whose participation, at the head of his German cavalry, in the terrible sack of that city, which he had been ordered to defend, has been narrated, was commanded to return to Antwerp. He was to present himself openly to the city authorities, but he was secretly directed by the Governor-General to act in co-operation with the Colonels Fugger, Frondsberger, and Polwiller, who commanded the forces already stationed in the city. These distinguished officers had been all summer in secret correspondence with Don John, for they were the instruments with which he meant by a bold stroke to recover his almost lost authority. While he had seemed to be seconding the efforts of the states-general to pay off and disband these mercenaries, nothing had in reality been farther from his thoughts; and the time had now come when his secret plans were to be executed, according to the agreement between himself and the German colonels. He wrote to them, accordingly, to delay no longer the accomplishment of the deed--that deed being the seizure of Antwerp citadel, as he had already successfully mastered that of Namur. The Duke of Aerschot, his brother, and son, were in his power, and could do nothing to prevent the co-operation of the colonels in the city with Treslong in the castle; so that the Governor would thus be enabled, laying his head tranquilly upon "the pillow of the Antwerp citadel," according to the reproachful expression subsequently used by the estates, to await the progress of events.