It was a clear moonlight night, with hardly a breath of air blowing, and all the countryside was made visible by the moon's rays, which silvered the roofs of all the villages and made every road like a white tape. Our planes went out over the enemy's lines laden with bombs, and patrolled up and down the tracks and made some thirty attacks upon the German transport and his marching columns. All his lines of approach were kept under continual fire by our guns of heavy calibre, and for miles around shells swept the points which marching men would have to pass, so that their way was hellish. Our aircraft went out and flew very low, and dropped bombs wherever they saw men moving through the luminous mists of the night. Behind our own lines air patrols guarded the countryside. They carried lights, and as they flew in the starlit sky they themselves looked like shooting stars until they dropped low, when their planes were diaphanous as butterfly's wings in sunlight. On the battlefield then was no unusual gun-fire for several hours after dark. Guns on both sides kept up the usual night bombardment in slow sullen strokes, but at least on the Australian front it was not until about 4.45 in the morning that the enemy opened a heavy barrage in Glencorse Wood. The Australian troops were already massed beyond that ground for the attack which was shortly due. On the north, up by Wurst Farm, on the lower slopes of the Gravenstafel, our London Territorials were also waiting to go "over the bags," as they call it. Against them the German guns put over a heavy barrage, but that line of explosives failed to stop or check the assault. It was almost dark when our London lads went forward through a thick ground mist, which was wet and clammy about them. Our artillery had opened before them the same monstrous line of barrage-fire which they had followed on the 20th. and they went after it at a slow trudge, which gave them time to avoid shell-craters and get over difficult ground without lagging behind that protecting storm. That violence of fire was as deadly and terrifying this morning as on that other day. Through the mist our men saw the Germans running and falling, and many of them did not stay in the blockhouses, though it was almost certain death to come out into the open before the barrage passed. There were dead men in many shell-craters before our men reached them, and others afterwards, as they passed through clumps of ruin which had once been hamlets and farms. There was such a mess of brickwork and masonry at Aviatik Farm, where Germans hiding in concrete walls fired machine-guns and rifles for a time until the British troops closed on them.