No Man’s Land between the trenches, with ears strained in the silence, a silence that can be felt, they listen for that dread noise, the muffled tap-tap of the enemy’s miners countermining towards them. Sometimes the mine goes through without any countermine at all—more often not. Frequently the countermine is exploded too soon, or the direction is wrong and no damage is done, but sometimes it is otherwise. Sometimes there will be a dull, rumbling explosion—a few mine cases will fly upwards from the centre of the ground between the trenches, perhaps a boot or a head, but nothing more. And the miners will mine no more. The countermine has been successful.
But the estimation of distance and direction under the ground by listening to the muffled tap of the other man is a tricky business, and depends on many things. A fissure in the right direction, and it will sound close to, when in reality it is far away; an impervious strata across your front, and it will sound afar off, when in reality it is near.
Which all goes to show that it is a game of chance. But I would ask the arm-chair
