The second company under Captain G. L. Wilkinson joined with the leading company in an attack on the German second-line trench. The enemy presented a stiff front and many were bayoneted who resisted. The group of prisoners sent back later with an escort came under fire of their own guns in Stony Mountain, and some of them were killed as well as a few of their captors. The third company was in charge of Lieutenant T. C. Sims, the other company officers, Captain F. W. Robinson and Lieutenant P. W. Pick, having been killed at the time of the mine explosion. In the advance across the open space between the lines they suffered many casualties, but completed the work of consolidating the first-line German trench that had been captured. The fourth company, which now advanced to support, met with a series of misfortunes. Captain Delamater, the officer in charge, was wounded, and Lieutenant J. C. L. Young, who assumed command, was wounded soon after. The command now devolved upon Lieutenant Tranter, who a moment later was killed. Company Sergeant Major Owen then assumed charge, who proved himself fully equal to the task in bravery and resource. When Lieutenant F. W. Campbell was bringing up two machine guns to the rear of Captain Wilkinson's company the whole crew of one gun were either killed or wounded. A few men of the other crew reached the Germans' first-line trench and pushed on toward Stony Mountain, preceded by bombers and under heavy fire, until held up by an enemy barricade. Of the machine-gun crew only Lieutenant Campbell and Private Vincent were fit to fight and they still had the machine gun and tripod. Lacking a suitable base, Lieutenant Campbell set up the gun on Private Vincent's broad back and maintained a continuous fire on the enemy. When German bombers invaded the trench Lieutenant Campbell was struck down, but succeeded in crawling out of the trench and was carried in a dying condition to the Canadian line by Company Sergeant Major Owen. Private Vincent meanwhile had made his escape from the enemy trench and brought away the machine gun in safety. The Germans' heavy machine-gun fire forced the Canadian working parties to abandon the attempt to construct the line joining the Canadian trenches with the enemy trench that had been captured. The battalion's efforts were now concentrated in building barricades immediately south of Stony Mountain and to the north of Dorchester, and to maintaining a strong hold on the second-line trench.