Presently, as I tramped on, splashing through water-pools and along rutty tracks ploughed up by the wheels of gun carriages, I heard the deeper, more sonorous booming of different guns, followed by a percussion of the air as though great winds were rushing into void spaces. These strange ominous sounds were caused by the heavy pieces which the enemy had brought up to the heights above the marshlands of the Aisne--the terrible 11-inch guns which outranged all pieces in the French or British lines. With that marvellous foresight which the Germans had shown in all their plans, these had been embedded in cement two weeks before in high emplacements, while their advanced columns were threatening down to Paris. The Germans even then were preparing a safe place of retreat for themselves in case their grand coup should fail, and our British troops had to suffer from this organization on the part of an enemy which was confident of victory but remembered the need of a safe way back. I have been for many strange walks in my life with strange companions, up and down the world, but never have I gone for such a tramp with such a guide as on this Sunday within sound of the guns. My comrade of this day was a grave-digger. His ordinary profession is that of a garde champêtre, or village policeman, but during the past three weeks he had been busy with the spade, which he carried across his shoulder by my side. With other peasants enrolled for the same tragic task he had followed the line of battle for twenty kilometres from his own village, Rouville, near Levignen, helping to bury the French and British dead, and helping to burn the German corpses. His work was not nearly done when I met him, for during the fighting in the region round the forest of Villers-Cotterets, twice a battlefield, as the Germans advanced and then retreated, first pursuing and then pursued by the French and British, 3000 German dead had been left upon the way, and 1000 of our Allied troops. Dig as hard as he could my friendly gravedigger had been unable to cover up all those brothers-in-arms who lay out in the wind and the rain. I walked among the fields where they lay, and among their roughly piled graves, and not far from the heaps of the enemy's dead who were awaiting their funeral pyres. My guide grasped my arm and pointed to a dip in the ground beyond the abandoned village of Levignen. "See there," he said; "they take some time to burn." He spoke in a matter-of-fact way, like a gardener pointing to a bonfire of autumn leaves. But there in line with his forefinger rose a heavy rolling smoke, sluggish in the rain under a leaden sky, and I knew that those leaves yonder had fallen from the great tree of human life, and this bonfire was made from an unnatural harvesting.