The sector now taken over extended from Chocolat Menier Corner on the right to Port Arthur on the left, and during the tour proved to be fairly quiet, except in the left subsection held by the Connaughts, where two strong points, Port Arthur and the Orchard Redoubt, and also the Crescent Trench, a circular trench connecting them, were daily subjected to heavy bombardments. The 4th Londons in reserve provided garrisons for the forward area as follows: D Company (Cart de Lafontaine) to the Orchard Redoubt, which it held in company with a party of the Connaughts. One Platoon of each of A, B and C Companies to the left subsection, under instruction in trench warfare by the Connaughts. Two Platoons each of B and C Companies (Moore and Vine) to Redoubts D5 and D6 respectively. These redoubts were close to Windy Corner on Forresters Lane, and were subsequently known as Dogs and Edward Posts. Machine-Gun Detachment to Port Arthur Keep, and Trench Mortar Section to the left subsection. The platoons under instruction were relieved every forty-eight hours in order to ensure that during the tour of duty the companies were all given a certain amount of trench experience. The remaining platoons, not for the moment employed in garrison duty, were billeted with Battalion Headquarters in Richebourg, and provided working and carrying parties each night for the line. The line was still not fully organised after the battle, and the Crescent Trench was not properly connected either to the Orchard on its right or to Port Arthur on the farther side of the La Bassée Road on its left; and as the construction of communication trenches in this area had not yet been seriously undertaken, the various companies holding those works were isolated during the hours of daylight, as were also the detached listening posts pushed forward in front of them into No Man's Land. There was thus a very considerable amount of trench work required to bring the defences to a proper state of organisation and also in the completion of the wire entanglements in front of the new advanced line, and the 4th Londons were called upon for heavy duties in this direction in conjunction with the Sappers and Miners.