The attachments lasted five days, the 107th Brigade being the only one which was not divided between two divisions in the line. Its attachment being complete, the 108th was sent up, two battalions to the 4th Division and two to the 48th, further north. Then, towards the end of the month, the 109th Brigade had its turn with the same two Divisions. Meanwhile the R.E. Headquarters and the three Field Companies had moved to Arquèves, to work on the new Third Army Line, later to become important as the Amiens Defences. At this task they were soon joined by the 16th Rifles (Pioneers), while they also had as companions French Territorials. All worked hard and well, though in the light of subsequent experience their trenches were far too narrow, and their traverses too small by half. The troops not under instruction in the line were kept hard at work training, officers from the 4th Division having come to initiate them into the mysteries of bombing--mysteries to which they took in kindly fashion. One instructor declared that the national sport of the Ulsterman, the throwing of kidney-stones in street riots, was an admirable preparation for bombing. Another introduction was to gas helmets, the horrible bags of those days without even mouth-pieces. Passing through a gas-chamber in these bags was unpleasant, though accepted as a necessity, but "doubling" and marching in them, as ordered by some zealous instructors, was purgatory, and resulted in some of the men being violently sick. On October the 21st the Division, except for such infantry and artillery as were under instruction in the line, moved slightly further west, toward Abbeville, to a more comfortable and spacious area about Bernaville and Canaples, with Headquarters at Domart-en-Ponthieu. The Higher Command had decided that the 36th Division was not to enter the line as a formation for the present. The Battle of Loos was not long past, when troops fresh from England had been pushed into the fight at its fiercest and after very long marches, with disastrous results. It was determined that in future divisions should be given a chance gradually to accustom themselves to the conditions. Another decision which had been arrived at was that New Army and Territorial Divisions should receive an admixture of thirty per cent. of regular infantry by the transfer of brigades. Orders were received for the transfer of one brigade to the 4th Division. The 107th, in the command of which General W. M. Withycombe, C.M.G., had succeeded General Couchman, was selected to go. The 12th Brigade of the 4th Division was transferred to the 36th Division in exchange.