There were shell-bursts wherever you looked, with your attention drawn to Contalmaison as it would be to a gathering crowd in the thick of city traffic. All the steel throats in clumps of woods, under cover of road embankments, in gullies and on the reverse side of slopes, were speaking. The guns were giving to Contalmaison all they had to give and the remaining walls of the chateau disappeared in a fog like a fishing smack off the Grand Banks. Super-refined, man-directed hell was making sportive chaos in the village which it hid with its steaming breath cut by columns of black smoke from the H.E.'s and crowned with flashes of shrapnel; and under the sun's rays the gases from the powder made prismatic splendor in flurries and billows shot with the tints of the rainbow. Submerging a simple farming hamlet in this kind of a tempest was only part of the plan of the gunners, who cut a pattern of fire elsewhere in keeping with the patterns of the German trenches, placing a curtain of fire behind the town and another on the edge, and at other points not a curtain but steady hose-streams of fire. Answering German shells revealed which of the chalky scars on the slope was the British first-line trench, and from this, as steam from a locomotive runs in a flying plume along the crest of a railway cutting, rose a billowing wall of smoke which was harmless, not even asphyxiating, its only purpose being to screen the infantry attack, with a gentle breeze sweeping it on into the mantle over Contalmaison as the wind carries the smoke of a prairie fire. Lookout Mountain was known as the battle in the clouds, where generals could not see what their troops were doing. Now all battles are in a cloud. From the first-line British trench the first wave of the British attack moved under cover of the smoke-screen and directly you saw that the shells had ceased to fall in Contalmaison. Its smoke mantle slowly lifting revealed fragmentary walls of that sturdy, defiant chateau still standing. Another wave of British infantry was on its way. Four waves in all were to go in, each succeeding one with its set part in supporting the one in front and in mastering the dugouts and machine gun positions that might have survived.