bombed down a trench only to find that it did not lead into the Strong Point.
Except on the 6th Divisional front and at High Wood, which was captured during the night, the whole line had advanced, and it was a bitter blow to the Division to think that their sacrifices had been in vain.
On the night of the 16/17th September the 18th Infantry Brigade relieved the sorely-tried 71st Infantry Brigade, and fresh preparations were made for an attack, on the 18th, of the Quadrilateral, which had been strongly reinforced by the enemy through the sunken road.
The K.S.L.I.

dug themselves in with their left on the railway, so as to assault the south-west face of the Strong Point.

The weather having cleared, the trenches were now carefully located from the air and heavily bombarded, and on the 18th September, under both a stationary and creeping barrage, and with the York and Lancasters bombing up the trench from Leuze Wood, and the 18th Infantry Brigade (West Yorks and 14th Durham Light Infantry) attacking the north-west face and the trench running north from the Quadrilateral, this redoubtable Strong Point was at last captured with comparatively small loss after what must be conceded as a magnificent defence, and which had cost the Division upwards of 3,500 casualties.

Nine machine-guns and 160 unwounded prisoners were taken in the Quadrilateral and many Germans killed.
The Quadrilateral once captured, the advance was carried forward for 1,000 yards to within half a mile of Morval and Lesboeufs.

These, which were the original objectives on the 13th September, were now to be attacked on the 25th September.