the surface to construct shell-proof shelters. Concrete machine-gun posts were appearing behind the trenches, which were heavily walled with timber and iron. Parapets were thick and high, trench interiors floored with wooden walkways. Militarily, the German front grew in strength week by week. Domestically, it was even becoming comfortable. Electric light was appearing in the deeper dugouts, together with fixed bedsteads, planked floors, panelled walls, even carpets and pictures. Rearward from their underground command posts ran telephone lines to their supporting artillery batteries. The
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