There was still a chance that the Guards would advance and render the position of the Bavarians impossible. But this chance was not realised. The Quadrilateral was a mass of machine guns, and, taking 75 the Guards Division in flank, inflicted fearful casualties. The first objective was taken and held--on the left the second objective was reached--but already the assaulting troops were being shot in the back by the Bavarians, and no further progress was made. Tanks do not seem to have helped in that direction either.
With this state of affairs on the left of the 56th Division, the attacking brigades were not likely to progress very far in the building up of a flank facing Combles. Until the Quadrilateral was taken the 167th Brigade could not possibly move. The 7th Middlesex had lost a lot of men from machine guns firing into their left rear as they advanced behind the assault of the 1st London Regt. And finally their Tank had broken down and was being attacked by the enemy.
By 11 a.m. the two reserve battalions of the 169th Brigade were moved forward to be used as reinforcements before the 168th Brigade was sent into action. Gen. Hull was determined to clear Bouleaux Wood, which had resisted so long. But at 1.30 p.m. the Corps Commander, Lord Cavan, telephoned him that the Guards had not made as much progress as he had thought, and that the operation against Bouleaux Wood would not be practicable. But before this order could reach them the 8th Middlesex made a further attempt to get into the wood and failed. All attention was then centred on the Quadrilateral, which was holding up the advance of no less than three divisions.
The division was ordered to consolidate where it stood, but during the night bombing attacks were carried out by the 169th Brigade on the sunken road and end of Loop Trench, and by the 167th Brigade on the 76 trench in Bouleaux Wood--neither met with success.
On the 16th the 6th Division again attacked the Quadrilateral and failed, but they were now well up to the stronghold. The Guards Division had also crept in from the north.
The 17th September was devoted to preparations for attacking on the 18th. The 169th Brigade made a trench parallel to the sunken road to Combles, and also managed to occupy some 200 yards more frontage along the road. Many dead Germans of the 26th Regiment were found.