It will be possible to describe the sequence of events with considerably less detail in this and other sectors of the line, since the general conditions of attack and defence may be taken as similar to that already described. Here also the bombardment began with its full shattering force of high explosive, blue cross invisible gas, mustard gas, phosgene, and every other diabolical device which the German chemist has learned to produce and the British to neutralise. In the case of the British infantry, many of them had to wear their gas masks for eight hours on end, and the gunners were in even worse plight; but these appliances, which will no doubt find a place in the museums of our children, were of a surprising efficiency, and hampered the experienced soldier far less than would have been thought. The infantry advance was at 9.45, the Germans swarming in under the cover of Nature's smoke barrage, for here, as in several other parts of the line, {49} a thick morning mist greatly helped the attack and screened the stormers until they were actually up to the wire, which had usually been shattered in advance by the trench-mortars. The line from Flesquières to Dernicourt in the region of the Fifty-first Division was less seriously attacked, and remained inviolate, but the northern stretch from Dernicourt to Lagnicourt was struck with terrific impact, and gave before the blow to very much the same extent as the divisions to the immediate north. The 71st Brigade in the Lagnicourt sector was especially hard hit, and was very violently assailed by a strong force of Germans, which included the 1st Prussian Guard. This famous regiment was at one time all round the 9th Norfolks, who succeeded at last in fighting themselves clear, though their Colonel, Prior, and the great majority of the officers and men in the battalion were killed or wounded. Even these wounded, however, were safely carried off, thanks to the devotion of Captain Failes and a handful of brave men. In this desperate struggle the whole brigade was decimated. The 16th and 18th Brigades had also suffered severely, but the division, in spite of its losses, was splendidly solid, and fell back slowly upon the support of the 75th Brigade of the Twenty-fifth Division, which had hastened up to the danger point. By evening, the Germans, advancing in great numbers and with fine resolution, had occupied the four villages of Doignies, Boursies, Louverval, and Lagnicourt, their total penetration from Boursies in the south to Ecoust in the north, a stretch of seven miles, averaging about 3000 yards. This advance had completely turned the left wing of the Fifty-first, which was compelled to fall back in consequence, {50} after stopping several attacks from across the Canal du Nord. All three brigades of the Fifty-first Division were in line, and of the three the left and centre had been seriously engaged, the enemy entering the front line of both before mid-day,