"It's only now that I remember the racket that went on. At the time you become immune to the sounds around you because you're so busy concentrating on where you must go, what you must do to stay alive. There's no room in your head for anything else except your survival. But the roar of guns, the screaming, the din catches up with you eventually. Also the sights that you see affect you more at a later stage than they do at the time. I won't forget men in a row. I won't forget men on fire. I won't forget a tin hat rolling, spinning across the embankment with the head of a man inside. Sounds and sights wait inside you, along with the stink of smoke, gunpowder, mud and rot and burning flesh. They invade your waking hours as well as your dreams."