Early in October General Heneker proceeded to carry out an ambitious scheme which he had meditated for some time, and which had now received the approbation of his Corps Commander. This was an attack by his own division upon the strong Fresnes-Rouvroy line, to the north-east of Arras. His plan was to make a sudden concentrated assault upon the south end of this formidable deeply-wired line, and then to work upwards to the north, avoiding the perils and losses of a frontal advance. This enterprise was begun at 5 A.M. on October 7, and was carried through with that mixture of dash and skill which marks the ideal operation. The 23rd and 25th Brigades supplied the storm-troops, who were drawn from the 2nd Middlesex, 2nd West Yorks, and 2nd Devons, and attacked on a front of 3500 yards. The gain of ground was nearly two miles; the line was broken and Biache was taken. On the next day, October 8, the northward turning movement was carried through, the 1st Worcesters, 1st Sherwood Foresters, and 2nd Berkshires pushing into the front line, the work being mainly carried out by bombing. Altogether 37 machine-guns and 250 prisoners were taken, together with the villages of Fresnes and Neuvireuil, so that the divisional front was now brought opposite the Drocourt-Quéant line. [Sidenote: Oct. 7.] This strong triple system of the Hindenburg type was attacked in the early morning of October 11 in this sector by Grogan's 23rd Brigade, and by 7 A.M. both the 2nd Middlesex and 2nd Devons were through it, holding the whole front before them, with the exception of the town of Vitry on the Scarpe. The Twelfth Division had taken the place of the Twentieth on the left of the Eighth, and it had also fought its {278} way forward, but it was still short of striking distance and could not take part in the attack. The chief danger was from the south, as the floods in the Trinquis River were holding up the First Canadian Division in that quarter, so that the German guns could all swing their muzzles to the north. This was obviated by a free use of smoke and gas, so that the British infantry were shrouded on their right flank. The barrage, by a very ingenious device, was not put down in such a fashion as to pin the Germans to their positions and make it more dangerous to fly than to stand, but it was poured upon one spot, and then moved slowly up the line at the rate of 100 yards in eight minutes, giving the garrison plenty of time to see and to avoid it by a timely flight, which most of them preferred to do. When the new position, which soon included Vitry, had been occupied, some of the 2nd Middlesex scrambled across the Scarpe by a broken bridge and took Mont Metier, the strong point on the left front of the Canadians, in the rear, so as to help their future advance. The total gain was not less than an average of three miles, with Cuincy in the centre as the most advanced point. The German line was now