Presently, when our artillery lifted, there were new clouds rising from the ground and spreading upward in a great dense curtain of a fleecy texture. They came from our smoke-shells, which were to mask our infantry attack. Through them and beyond them rolled another wave of cloud, a thinner, whiter vapor, which clung to the ground and then curled forward to the enemy's lines. “That's our gas!” said a voice on one of the slag heaps, amid a group of observers--English and French officers. “And the wind is dead right for it,” said another voice. “The Germans will get a taste of it this time!” Then there was silence, and some of those observers held their breath as though that gas had caught their own throats and choked them a little. They tried to pierce through that bar of cloud to see the drama behind its curtain--men caught in those fumes, the terror-stricken flight before its advance, the sudden cry of the enemy trapped in their dugouts. Imagination leaped out, through invisibility, to the realization of the things that were happening beyond. From our place of observation there were brief glimpses of the human element in this scene of impersonal powers and secret forces. Across a stretch of flat ground beyond some of those zigzag lines of trenches little black things were scurrying forward. They were not bunched together in close groups, but scattered. Some of them seemed to hesitate, and then to fall and lie where they fell, others hurrying on until they disappeared in the drifting clouds. It was the foremost line of our infantry attack, led by the bombers. The Germans were firing tempests of shells. Some of them were curiously colored, of a pinkish hue, or with orange-shaped puffs of vivid green. They were poison-shells giving out noxious gases. All the chemistry of death was poured out on both sides--and through it went the men of the Midland Division. The attack on the right was delivered by a brigade of Staffordshire men, who advanced in four lines toward the Big Willie trench which formed the southeast side of the Hohenzollern redoubt. The leading companies, who were first over our own parapets, made a quick rush, half blinded by the smoke and the gaseous vapors which filled the air, and were at once received by a deadly fire from many machine-guns. It swept their ranks, and men fell on all sides. Others ran on in little parties flung out in extended order. Young officers behaved with desperate gallantry, and as they fell cheered their men on, while others ran forward shouting, followed by numbers which dwindled at every yard, so that only a few reached the Big Willie trench in the first assault.