The third section of the assault of October 18, the unimportant attack on the church of San Roman, had a certain measure of success. The mine, though it did not level the whole building, as had been hoped, blew up the terrace in front of, and part of its west end. Thereupon the French evacuated it, after exploding a mine of their own which brought down the bell-tower and much more, and crushed a few of the caçadores and Spaniards[58] who were ahead of their comrades. The besiegers were able to lodge themselves in the ruins, but could make no attempt to approach the actual walls of the second _enceinte_. So the 6th Division remained behind, within the streets of Burgos, and never came forward or showed themselves. Such was the unhappy end of this most unlucky siege. All through the day of the assault there had been heavy skirmishing going on at the outposts of the covering army; Souham was at last on the move. On the 19th the Guards’ brigade and the K.G.L. brigade of the 1st Division marched to join the 5th and 7th Divisions at the front, leaving only the line brigade (Stirling’s) to hold the trenches on the north and west sides of the Castle. Two-thirds of the 6th Division had already gone off in the same direction before the storm: now the rest followed, handing over the charge of Burgos city and the chain of picquets on the east side of the Castle to Pack’s Portuguese. There was little doing in the lines this day--the French built up the oft-destroyed parapet of breach III with sandbags, and made an incursion into the church of San Roman, driving out the Portuguese guard for a short time, and injuring the lodgement which had been made in the ruins. But they withdrew when the supports came up. On the 20th, news being serious at the front--for Souham showed signs of intending to attack in force, and it was ascertained that he had been reinforced by great part of the Army of the North, under Caffarelli in person--Wellington gave orders to withdraw the guns from the batteries, leaving only two of the captured French pieces to fire an occasional shot. All transportable stores and ammunition were ordered to be loaded up. There was some bickering in San Roman this day, but at night the Portuguese were again in possession of the much-battered church.