In some cases the tunnelling company were able to destroy his galleries by camouflets when they were actually being worked, and thus bury the tunnellers and their spoiling parties. On these occasions the tunnelling company were always highly elated, as they took a professional pride in scoring off their real opponents the tunnellers, and considered this a far finer achievement than blowing up a trench full of mere infantrymen. The Germans also adopted the same tactics, and continuous warfare between the tunnellers of both sides raged underground. Though the tunnellers, when once in their galleries, were free from the attentions of snipers, trench-mortars, and shells, yet their own form of warfare was hazardous and dangerous enough. When the galleries of the opposing sides were close, it was never known whether a gallery had not been located and might not at any moment be blown in, all the men working in it being crushed or suffocated. On occasions a British and German gallery would meet, and hand-to-hand fights with picks and crowbars underground would ensue, which had to be fought out in darkness in the narrow tunnels. The danger from natural gases, with all the attendant difficulties of rescuing men overcome by the fumes, was constant. Falls of earth and chalk, possibly due to some heavy explosion above ground, might also occur, which might bury the worker or cut him off from the exit of the gallery. It must be remembered that the tunnellers were not highly trained soldiers in their early manhood, but professional miners, often men of middle age, who had in many cases come to France straight from the pits at home. They were, indeed, a splendid breed of men, and the infantry owed much to them. There is little question but that they were far superior to the German tunneller. The latter was often a cunning worker, but the British tunneller could always be relied on to beat him for pace. It may also be added that the tunnelling companies all contained an appreciable number of Scottish miners. Mine warfare affects the infantry in several ways. First, it necessitates their finding an enormous number of carrying parties to assist in getting rid of the spoil, as the excavated earth or chalk is called. The infantryman never liked this work, as, among other things, it made his clothing, particularly his kilt, extremely dirty. It also appeared unending. However, he was reasonably contented with it if he had the satisfaction of occasionally seeing the German trenches and dug-outs hoisted into the air.