Wow. No comment, just...wow. Just over a mile and a half, while under fire.You mean at a mile and a half someone was firing back at him?
By daylight, after coming under enemy machine-gun fire, he managed to ease his rifle barrel between two rocks and quickly located an enemy sniper hiding behind a small piece of corrugated steel between two trees. He guessed the distance at 1,700 metres and fired one shot through the metal, killing the man instantly.
That certainly suggests that he was under fire for that one. In any case, if he were under fire for the second shot, it does not necessarily mean that it was an enemy infantryman firing back - it could have been another sniper, or perhaps mortar fire, or the like. Nevertheless, it's still a hell of a shot, regardless of the exact conditions. I know I certainly couldn't duplicate it - could you? :^)