The night was dark and it was pouring with rain, when the Battalion formed up along the line of railway between Haussy and St. Vaast. It is impossible adequately to describe the absolute wretchedness of forming up on a pitch-dark night in pouring rain. An operation seemed hopeless, and was only possible by giving careful instructions to every single man in the Battalion. Plenty of time was allowed to prepare for this fight, but the Battalion was only just ready when the time came to advance. No. 4 Company, under Lieutenant Bliss, was on the left; No. 3 Company, under Lieutenant Challands, in the centre; and No. 2 Company, under Lieutenant Kennaway, on the right. Touch was obtained with the 8th Battalion Gloucester Regiment in the Nineteenth Division on the left, and with the Irish Guards on the right. The Royal Engineeers had arranged to lay tapes from the railway to the eight temporary bridges, which they had put over the River Selle, but these tapes were not laid until shortly before zero hour, and one tape did not lead to a bridge, with the result that the platoon which followed it had to wade across the river. [Sidenote: Oct. 20.] From the very start everything went well, and the barrage moved with perfect precision. Chasing the Germans in the dark in this way was not without excitement, as no one knew whether they would remain and fight, or retire as soon as they were threatened. It was a great relief to Major Bailey to find that the enemy had no intention of disputing the crossing of the river, as this would have entailed the loss of a number of men at the start. As it was, the Battalion proceeded in artillery formation as far as the Haussy--Solesmes road, passing over five or six lines of rifle-pits wonderfully well made in concrete. When the creeping barrage began to move forward, the Battalion moved with it, but there was little or no opposition, and the objective was gained according to scheduled time. The few prisoners that were captured said that the garrisons of their posts had fled as soon as the barrage began. Direction was admirably kept, and the men advanced close up to the barrage, in spite of the heavy plough on the side of the hill on which they had to advance. The 2nd Battalion Scots Guards and 1st Battalion Welsh Guards then came through, and continued the advance. In the evening the German artillery put down a very heavy barrage on the railway, shifting it later to the road, and then covering the objective and the reverse slope of the hill, but in spite of the shelling the casualties were not heavy. [Sidenote: Oct. 21.] The shelling continued all the next day, but the 3rd Guards Brigade was not required. In the evening the Battalion took over the whole Brigade front from the Scots Guards and Welsh Guards; the King's and No. 3 Companies were placed in the outpost line; and Nos. 2 and 4 Companies took over the main line of resistance on the high ground east of the Solesmes--Vendegies road. [Sidenote: Oct. 22.]