In the course of the day, Oberstein received a letter from Don Sandra d'Avila, calling solemnly upon him to fulfil his treaty of the 29th of October. The German colonels from the citadel had, on the previous afternoon, held a personal interview with Oberstein beneath the walls, which had nearly ended in blows, and they had been obliged to save themselves by flight from the anger of the Count's soldiers, enraged at the deceit by which their leader had been so nearly entrapped. This summons of ridiculous solemnity to keep a treaty which had already been torn to shreds by both parties, Oberstein answered with defiance and contempt. The reply was an immediate cannonade from the batteries of the citadel; which made the position of those erecting the ramparts excessively dangerous. The wall was strengthened with bales of merchandise, casks of earth, upturned wagons, and similar bulky objects, hastily piled together. In, some places it was sixteen feet high; in others less than six. Night fell before the fortification was nearly completed. Unfortunately it was bright moonlight. The cannon from the fortress continued to play upon the half-finished works. The Walloons, and at last the citizens, feared to lift their heads above their frail rampart. The senators, whom Champagny had deputed to superintend the progress of the enterprise, finding the men so indisposed, deserted their posts. They promised themselves that, in the darkest hour of the following night, the work should be thoroughly completed. Alas! all hours of the coming night were destined to be dark enough, but in them was to be done no manner of work for defence. On Champagny alone seemed devolved an the labor and all the responsibility. He did his duty well, but he was but one man. Alone, with a heart full of anxiety, he wandered up and down all the night. With his own hands, assisted only by a few citizens and his own servants, he planted all the cannon with which they were provided, in the "Fencing Court," at a point where the battery might tell upon the castle. Unfortunately, the troops from Brussels had brought no artillery with them, and the means of defence against the strongest fortress in Europe were meagre indeed. The rampart had been left very weak at many vital points. A single upturned wagon was placed across the entrance to the important street of the Beguins. This negligence was to cost the city dear. At daybreak, there was a council held in Oberstein's quarters. Nearly all Champagny's directions had been neglected. He had desired that strong detachments should be posted during the night at various places of Security on the outskirts of the town, for the troops which were expected to arrive in small bodies at the citadel from various parts, might have thus been cut off before reaching their destination. Not even scouts had been stationed in sufficient numbers to obtain information of what was occurring outside. A thick mist hung over the city that eventful morning.