The German engineer, who had so methodically traced the successive operations of the siege, was evidently embarrassed by the strategy of the besieged. It was in his opinion barbarous, absolutely contrary to rules, and showed an ignorance of, and contempt for the art of fortification, which must end in disaster. [Illustration: FIG. 74.] During the night of the 23rd of February the Germans were finishing their second parallel, except in the north-west side. They gave the eastern branch of this parallel an inclination towards the south,[63] and commenced the batteries 11, 12, 13, 14, and 15. Battery 13, of two guns, was to rake the work A. But that same night Captain Allaud terminated the second battery, C, started the third, D, had an intrenchment made on the ridge of the plateau, and raised an epaulement, E, to sweep the slopes, with a good parados. If the besieged succeeded in finishing and arming these works, the batteries 11 and 12 of the besieger would be taken obliquely, the boyaux of communication would be for the most part raked, and the siege would have to be recommenced. The German general was in a very bad humour, and blamed the commander of the engineers, who, with his plan on the table, endeavoured to show that his siege had been duly arranged, according to all the rules of the art; that the ignorant temerity of these Frenchmen could not be foreseen, and that if the Germans acted with vigour, they would be made bitterly to repent of thus advancing wedge-like on the flank of the attack; that such a thing had never been seen, and that if they concentrated three batteries on this salient in the air, they would soon crush it. On the morning of the 24th of February two twenty-four pounders, placed in battery on the left face of bastion VIII., opened fire on batteries 13, 14, and 15 of the besieger, which they raked, and damaged greatly before they were completely finished. This time the German general proceeded from ill-humour to passion and even menaces; so that the unfortunate officer of the engineers, repairing to these batteries after a violent scene to raise traverses and rectify the line, which he asserted had not been executed conformably to his instructions, had his head broken by a splinter from a gun-carriage. The direction of the engineering was then given to a young officer, who, after a conference with General Werther, modified the plan of the attack. During the 24th of the month there was scarcely any firing on either side, the besieger firing only at long intervals. The French garrison, which was anxious to economise its munitions, scarcely replied, but worked with ardour at perfecting its advanced works on the west. A sortie effected during the night of the 24th, to ascertain whether the enemy was re-taking possession of batteries 1, 2, and 3, only encountered advanced posts, which retired after a feeble resistance. These three batteries were in the condition to which they had been reduced by the preceding sortie.