The rain, which had started early in the day, was still falling when the Battalion arrived at Doignies. The village was a good deal knocked about, but shelter of a sort was found, and the Battalion was just well off to sleep when it was turned out again to move nearer the line for the purpose of taking over the British front line from the London Scottish early next day. About midnight the Battalion got under way in pitch darkness, and moving through Louverval reached its assembly area near Piccadilly and about 500 yards in rear of the line by 4.10 a.m. on the 23rd November. As soon as the growing daylight permitted, companies resumed their advance and took over Rook, Rabbit and Herring Trenches from the London Scottish, Headquarters occupying a sunken road north of the wood surrounding Louverval Château. On relief the assaulting companies of the London Scottish moved forward to continue the bombing attack started by the 169th Brigade. News of the operation was slow in coming through, but by 10.17 a.m. a report reached Brigade that the attackers had been checked on endeavouring to emerge from Tadpole Copse. This check was due to a peculiar omission in the British trench maps, which had shown Tadpole Copse on the crest of a spur, and dominating all the ground in its immediate vicinity. It was found that between the Copse and the Inchy Road was a narrow and sharply marked depression bordered by the declivitous banks which abound in this undulating countryside. Beyond this unsuspected valley the Inchy Road was on an eminence just as prominent as the Tadpole Copse hill; and this position, held by the enemy in great strength, enabled them to overlook completely all the northern exits from the Copse. This valley, which played an important part in the course of the battle, was found subsequently to be correctly marked on German maps which were captured during the action. After a stubborn fight the London Scottish overcame this obstacle and pushed home their attack in the Hindenburg front trench almost as far as Adelaide Street and in the support 100 yards beyond the Inchy Road; while a subsidiary attempt was made, without success, to capture the Factory between this point and Inchy. At these points the enemy had constructed blocks which he held strongly against all attempts to dislodge him. In the meantime the 169th Brigade had been bombing up the communications leading back to the second system of the Hindenburg lines, with the object of isolating Mœuvres, but the resistance met with here was exceedingly stubborn.