Extract from the war diary of Lt Charles Brockbank, 1st Bn, 22nd (Cheshire) Regiment
Saturday. O.O. today. The sentry reported suspicious noises at the Gunpowder Magazine & I heard it too, but could not make it out. It sounds like someone mining. I got the Ammunition O.O. & S-M. & they are going to report it. Tommy went round with me. He is a good watchdog.