The French meanwhile were very active, though the constant increase of sickness in the 3rd Corps was daily thinning the regiments, till the proportion of men stricken down by fever was hardly less than that among the Spaniards. On the seventeenth and eighteenth Lacoste began to contrive a descent into the bottom of the ravine of the Huerba, by a series of zigzags pushed forward from the third parallel, both in the direction of Santa Engracia and in that of the Palafox battery. The latter was repeatedly silenced by the advanced batteries of the besiegers, but they could not subdue the incessant musketry fire from windows and loopholes which swept the whole bed of the Huerba, and rendered the work at the head of the new sap most difficult and deadly. Sometimes it had to be completely abandoned because of the plunging fire from the city[132]. Yet it was always resumed after a time: the French found that their best and easiest work was done in the early morning, when, for day after day, a dense fog rose from the Ebro, which rendered it impossible for the Spaniards to see what was going on, or to aim with any certainty at the entrenchments. Irritated at the steady if slow progress of the enemy, Palafox launched on the afternoon of January 23 the most desperate sortie that his army had yet essayed against the advanced works of the French. At four o’clock on that day[133] three columns dashed out and attacked the line of trenches: one, as a blind, was sent out opposite the Aljafferia, to distract the attention of Morlot’s division from the main sally. The other two were serious attacks, but both made with too small numbers--apparently no more than 200 picked men in each. The left-hand column became hotly engaged with the trenches to the north of San José, and got no further forward than a house a little beyond the Huerba, from which they expelled a French post. But the right-hand force carried out a very bold programme. Crossing the Huerba below Santa Engracia, they broke through the third parallel, and then made a dash at two mortar-batteries in the second parallel which had particularly annoyed the defence on that morning. The commander of the sortie, Mariano Galindo, a captain of the Volunteers of Aragon, led his men so straight that they rushed in with the bayonet on the first battery and spiked both its pieces. They were making for the second when they were overwhelmed by the trench guard and by reinforcements hurrying up from Musnier’s camp. Of a hundred men who had gone forward with Galindo from the third parallel twelve were killed and thirty, including their brave leader, taken prisoners. The French stated their loss at no more than six killed and five wounded, a figure that seems suspiciously low, considering that the first line of trenches had been stormed by the assailants, and a battery in the second line captured and disabled. Galindo had gone forward more than 500 yards, into the very middle of the French works, before he was