The first twenty-four hours spent in the sector were sufficient to make it quite evident that the hostile artillery had not decreased since the Division had been relieved towards the end of April. The left battalion trench system, then Roeux village, then the area between battalion and brigade headquarters, and finally the reserve battalion, were all heavily bombarded on the 13th. Brigade headquarters, being in deep dug-outs, were well protected against bombardment. The battalion headquarters were, however, not so well situated. Those of the right and support battalions were in elephant shelters cut into a bank just east of the river Scarpe. As these shelters were in an area that drew a considerable amount of shell-fire, and as they were not even proof against a 4·2 howitzer, they were most unsatisfactory domiciles. The left battalion had its headquarters in an old German bomb store in a quarry north of the railway. This bomb store was reasonably shell-proof, but the quarry was a well-marked feature to which the German gunners paid continual attention. During the day of the 13th the enemy shelled the eastern portion of Roeux; it was therefore assumed that he had evacuated it. Accordingly at 10 P.M. the whole line south of the railway was advanced to a road running due northwards from the eastern outskirts of Roeux. Positions were then taken up in shell-holes clear of this road. The whole of the village of Roeux also was occupied, six wounded prisoners being captured, one German being killed, and several wounded men of the 4th Division being brought in. As this considerable advance was made without any fighting, the day became known to the Jocks as "The Meatless Day." Vickers guns were sent forward during the night to take up positions in the most forward line of posts or in advance of it. The results of this method of disposing the Vickers guns, as will be seen, proved far-reaching. During this period the enemy was extremely active with low-flying aeroplanes over the forward area, and it was clear that he was making every effort to locate our defences. At 9.40 A.M. on the 14th there were nine such aeroplanes flying low over our trenches at the same moment. On occasions coloured lights were fired by them, a heavy shelling of the chemical works or some portion of the trench area ensuing. At other times his artillery was directed by observers who were seen to climb into "crows' nests" in the trees of Hausa and Delbar Woods. Machine-guns and shrapnel were frequently employed to discourage this form of activity.