H. D. Trounce, Fighting the Boche Underground
“ So intense was the fighting below ground in our operations on the Vimy Ridge that we would explode sometimes as many as 4 separate mines a night on our own small company front, only 500 yards in length of sector. In one of our clay galleries we reached the enemy trenches and, passing under them, ran into the timber of one of their mining-shafts. Carefully cutting a small hole through one of their timbers we listened there, relieving each other from time to time for nearly twenty-four hours. We would carefully crawl up to our listening-hole and sit tight in the dark, hardly daring to breathe. ”
