1/6th Battalion War Diary [WO/95/2694]
10 Aug 4am: Movement reported in the enemy lines just North of the Hulluch-Vermelles Road and a heavy barrage put down on our right subsection. our artillery and machine guns opened and no hostile attack developed.
That evening 5th and 8th Battalions relieved 6th and 7th Battalions in the right and left subsection respectively.
139 Infantry Brigade: Headquarters War Diary [WO95/2692]