After some weeks' inaction the imperialist forces, gathering from all quarters, proceeded to invest the marauders in Shanghai, and had the attack been conducted with any degree of military skill and vigor they must have succumbed at the first onset. But, owing to the pusillanimity of the emperor's officers and their total ignorance of the military art, the siege went on for an indefinite period, and twelve months after it began seemed as far off conclusion as ever. While the imperialists laboriously constructed their lines and batteries they never ceased to importune the Europeans for assistance, and as it became clearer that the persons in possession of Shanghai were a mob rather than a power, the desire increased among the foreigners generally to put an end to what was an intolerable position. On this occasion the French took an initiative which had previously been left to the English. The French settlement at Shanghai consisted at this time of a consulate, a cathedral, and one house, but as it was situated nearest the walls of the Chinese city it was most exposed to the fire of the besiegers and besieged. In consequence of this the French admiral, Laguerre, determined to take a part in the struggle, and erecting a battery in the French settlement, proceeded to bombard the rebels on one side of the city while the imperialists attacked it on another. Although the bombardment was vigorous and effective, the loss inflicted on the insurgents was inconsiderable, because they had erected an earthwork behind the main wall of the place, and every day the Triads challenged the French to come on to the assault. At last a breach was declared to be practicable, and 400 French sailors and marines were landed to carry it, while the imperialists, wearing blue sashes to distinguish them from the rebels, escaladed the walls at another point. But the assault was premature, for, although the assailants gained the inside of the fortification, they could not advance. The insurgents fought desperately behind the earthworks and in the streets, and after four hours' fighting they put the whole imperialist force to flight. The French were carried along by their disheartened allies who, allowing race hatred to overcome a temporary arrangement, even fired on them, and when Admiral Laguerre reckoned up the cost of his intervention he found it amounted to four officers and sixty men killed and wounded. Such was the result of the French attack on Shanghai, and it taught the lesson that even good European troops cannot ignore the recognized rules and precautions of war. After this engagement the siege languished, and the French abstained from taking any further part in it. But the imperialists continued their attack in their own bungling but persistent fashion, and at last the insurgents, having failed to obtain the favorable terms they demanded, made a desperate sortie, when a few made their way to the foreign settlement, where they found safety,