On January 24 the French had succeeded in pushing three approaches across the Huerba, and were firmly established under its northern bank. Two days later they made lodgements in ruins, cellars, and low walls where buildings had been pulled down, in the narrow space between the town wall and the river bank, below the Palafox battery. The cannon of the defenders could only act intermittently: every night the parapets were repaired, but every morning after a few hours of artillery duel the Spanish guns were silenced by the dreadful converging fire poured in upon them. Meanwhile Palafox was heaping barricade upon barricade in the quarters behind the threatened points, and fortifying the houses and convents which connected them. The final crisis arrived on the twenty-seventh. There were now three practicable breaches,--two were on the side of the Palafox battery, one in the convent of Santa Engracia. To storm the first and second Lannes told off the light companies of the first brigade of Grandjean’s division; to the third was allotted the 1st regiment of the Vistula from Musnier’s division. Heavy supports lay behind them, in the third parallel, with orders to rush in if the storming parties should prove successful. The assault was delivered with great dash and swiftness at noon on the twenty-seventh. On two points it was successful. At the most northern breach the assailants reached the summit of the wall, but could not get down into the city, on account of the storm of musketry from barricades and houses that swept the gap into which they had advanced. They merely made a lodgement in the breach itself, and could penetrate no further. But in the central breach, close beneath the Palafox battery, the voltigeurs not only passed the walls, but seized the ‘Oil Mill’ which abutted on them, and a triangular block of houses projecting into the town. At the Santa Engracia breach they were even more fortunate: the Poles carried the convent with their first rush: its outer wall had been battered down for a breadth of thirty yard and entering there the stormers drove out the Spaniards from the interior buildings of the place, and got into the large square which lies behind it, where they seized the Capuchin nunnery. Thus a considerable wedge was driven through the _enceinte_, and the Spaniards had to evacuate the walls for some little distance on each side of Santa Engracia. From the stretch to the west of that convent they were driven out by an unpremeditated assault of Musnier’s supports, who ran out from the trenches on the left of the Huerba, and escaladed the dilapidated wall in front of them, when they saw the garrison drawing back on account of the flanking fire from Santa Engracia. They got possession of the whole outer _enceinte_ as far as the Trinitarian convent by the Carmen gate.