The 109th Brigade on the left was helped by a mine at Peckham House and the devastated area was crossed without resistance, German survivors being stunned by the mine explosions. The 16th (Irish) Division attacked between Maedelstede Farm and the Vierstraat–Wytschaete road. The mines at Maedelstede and the two at Petit Bois devastated the defence; the mines at Petit Bois on the left were about 12 seconds late and knocked over some of the advancing British infantry. On the left of IX Corps, the 19th Division, north of the Vierstraat–Wytschaete road, attacked with two brigades into the remains of Grand Bois and Bois Quarante. Three mine explosions at Hollandscheschuur allowed the infantry to take a dangerous salient at Nag's Nose, as German survivors surrendered or retreated. X Corps had a relatively short advance of 700 yards (640 m) to the crest and another 600 yards (550 m) across the summit, which would uncover the German defences further north on the southern slope of the Gheluvelt plateau and the ground back to Zandvoorde. The German defences had been strengthened and had about double the normal infantry garrison. The German artillery concentration around Zandvoorde made a British attack in the area highly vulnerable but the British counter-battery effort suppressed the German artillery, its replies being late and ragged. On the night of 6/7 June, gaps were cut in the British wire to allow the troops to assemble in no-man's-land, ready to attack at 3:10 a.m. The 41st Division attacked with two brigades past a mine under the St. Eloi salient, finding the main obstacle to be wreckage caused by the explosion. The 47th and 23rd divisions formed the left defensive flank of the attack, advancing onto the ridge around the Ypres–Comines canal and railway, past the mines at Caterpillar and Hill 60.
