Later, Lieut.-Colonel S. Macdonald, commanding the 6th Seaforth Highlanders, received orders that he was to cross the railway, get into touch with the 4th Seaforth Highlanders east of the chemical works, and consolidate a line from their left to the railway. Colonel Macdonald then instructed his battalion to cross the railway in two parties, one north of the station and the other south of it. The party detailed to advance north of the station found that the enemy was holding the station buildings, and two officers who went forward to try and locate the 4th Seaforth Highlanders east of the chemical works were captured. They walked right into a strong party of the enemy immediately south of the level crossing. This party of Germans then became engaged with the leading company of the detachment of the 6th Seaforth Highlanders, and sharp skirmishing took place. The companies which crossed south of the station came under heavy machine-gun fire while crossing the railway, and it soon became evident that the enemy must have retaken the chemical works, and that he was holding them in strength. The 6th Seaforth Highlanders therefore constructed a trench on the north side of the railway and parallel to it, to form a flank defence to the troops dug in on the eastern side of the Roeux-Gavrelle Road. It subsequently transpired that, while the position of our troops was as described on page 166, the enemy continually counter-attacked during the day. He concentrated a considerable amount of artillery on the chemical works and on the Black line, and ultimately had by this means so reduced the defenders that they were compelled to fall back. During the withdrawal most of the remaining officers had been hit, and the troops had become disorganised owing to their losses. The result was that the withdrawal of the various posts could not be well co-ordinated, thus some remained in position while others fell back. In this manner a complete section of the 152nd Brigade Machine-Gun Company, left isolated in the chemical works, was surrounded by the enemy and captured. When it was definitely known that the advance had been held up, orders were issued for the Division to resume the attack in conjunction with the 17th and 37th Divisions at 6 P.M. Orders for this attack were issued to the brigades; but the troops were so closely engaged with the enemy resisting his counter-attacks that their action was restricted to an attempt to keep touch with the advance of the Divisions on the flanks by means of strong patrols. The hostile counter-attacks, already frequently referred to, began at 9 A.M. The enemy several times attempted to advance over Greenland Hill in extended lines. In each case on this portion of the front his attacks were broken up by artillery and machine-gun fire, and were checked some 500-800 yards east of the Roeux-Gavrelle Road.