Two companies of the 4th Gordon Highlanders from the Divisional reserve were therefore ordered forward and placed at the disposal of General Campbell. Meanwhile General Burn had ordered forward a company from the reserve battalion (6th Gordon Highlanders) to fill the gap caused in the ranks of the 5th Seaforth Highlanders by uncut wire. This company successfully entered the German second line, but was unable to debouch from it owing to machine-gun fire from the German third line. Two bombing squads from the 6th Gordon Highlanders were therefore sent forward to clear the front. These squads were extremely well handled by their leaders, and by attacking the machine-guns in the third line from the flank succeeded in capturing 2 officers and 51 men. This action enabled the whole of the right battalion to reach the Green line. Two other bombing squads were also ordered forward from the 6th Gordon Highlanders to bomb southwards, so as to clear the left flank of the 6th Black Watch. It was not, however, until dusk that all resistance in this area was successfully overcome. The 8th Argyll and Sutherland Highlanders were meanwhile consolidating the Green line in touch with the 2nd Division on their left. At this time little news could be obtained by headquarters of the 153rd Brigade, as all their runners were killed or wounded by Germans still holding out in the trench system. The situation was therefore obscure except at the "Y" Ravine, which was known to be held by the enemy. The two companies 4th Gordon Highlanders were therefore ordered to supply three bombing parties to work inwards towards the "Y" Ravine, one from the north and two from the south. The 5th Gordon Highlanders, who had followed in support of the leading battalions south of the salient, were fighting with elements of the 6th Black Watch and the 7th Gordon Highlanders for the German second line. In front of the salient parties of men who had been held up had returned to the British front line. These men were collected by Lieut.-Colonel T. M. Booth, D.S.O., commanding 6th Black Watch. He at once sent out patrols to locate exactly where the enemy was holding out, and on the information thus obtained organised a fresh attack against the "Y" Ravine. Colonel Booth arrived with this party just as Lieutenant Leslie of the 6th Black Watch, by a most gallant action, had gained an entrance at the point of the "Y" Ravine. He was immediately followed by Colonel Booth with forty men and a Lewis gun, and by parties of the 5th and 7th Gordon Highlanders who had been hanging on to the occupants of the "Y" Ravine all the morning.