“The signal for a bombardment by ‘heavies’ was given by the English airplanes. On the first day we tried to fire by platoons on the airplanes, but a second airplane retaliated by dropping bombs and firing his machine-gun at our troops. Our own airmen appeared only once for a short time behind our lines.

“While many airplanes are observing from early morning till late at night, our own hardly ever venture near. The opinion is that our trenches cannot protect troops during a barrage of the shortest duration, owing to lack of dugouts.

“The enemy understands how to prevent, with his terrible barrage, the bringing up of building material, and even how to hinder the work itself. The consequence is that our trenches are always ready for an assault on his part. Our artillery, which does occasionally put a heavy barrage on the enemy trenches at a great expense of ammunition, cannot cause similar destruction to him. He can bring his building material up, can repair his trenches as well as build new ones, can bring up rations and ammunition, and remove the wounded.