The assault on these positions was to be made by two New Army divisions of the 4th Corps: the 47th (London) Division, and the 15th (Scottish) Division. They were to be supported by the 11th Corps, consisting of the Guards and two new and untried divisions, the 21st and the 24th. The Cavalry Corps (less the 3d Cavalry Division under General Fanshawe) was in reserve far back at St.-Pol and Pernes; and the Indian Cavalry Corps under General Remington was at Doullens; “to be in readiness,” wrote Sir John French, “to co-operate with the French cavalry in exploiting any success which might be attained by the French and British forces.”... Oh, wonderful optimism! In that Black Country of France, scattered with mining villages in which every house was a machine-gun fort, with slag heaps and pit-heads which were formidable redoubts, with trenches and barbed wire and brick-stacks, and quarries, organized for defense in siege-warfare, cavalry might as well have ridden through hell with hope of “exploiting” success... “Plans for effective co-operation were fully arranged between the cavalry commanders of both armies,” wrote our Commander-in-Chief in his despatch. I can imagine those gallant old gentlemen devising their plans, with grave courtesy, over large maps, and A. D. C.'s clicking heels in attendance, and an air of immense wisdom and most cheerful assurance governing the proceedings in the salon of a French chateau. .. The 3d Cavalry Division, less one brigade, was assigned to the First Army as a reserve, and moved into the area of the 4th Corps on the 2lst and 22d of September. II The movements of troops and the preparations for big events revealed to every British soldier in France the “secret” of the coming battle. Casualty clearing-stations were ordered to make ready for big numbers of wounded. That was always one of the first signs of approaching massacre. Vast quantities of shells were being brought up to the rail-heads and stacked in the “dumps.” They were the first-fruit of the speeding up of munition-factories at home after the public outcry against shell shortage and the lack of high explosives. Well, at last the guns would not be starved. There was enough high-explosive force available to blast the German trenches off the map. So it seemed to our innocence--though years afterward we knew that no bombardment would destroy all earthworks such as Germans made, and that always machine-guns would slash our infantry advancing over the chaos of mangled ground.