Lord Roberts's plan was absolutely simple, and yet, had it been carried out as conceived, absolutely effective. It was not his intention to go near any of that entanglement of ditch and wire which had been so carefully erected for his undoing. The weaker party, if it be wise, atones for its weakness by entrenchments. The stronger party, if it be wise, leaves the entrenchments alone and uses its strength to go round them. Lord Roberts meant to go round. With his immense preponderance of men and guns the capture or dispersal of the enemy's army might be reduced to a certainty. Once surrounded, they must either come out into the open or they must surrender. On March 6th the cavalry were brought across the river, and in the early morning of March 7th they were sent off in the darkness to sweep round the left wing of the Boers and to establish themselves on the line of their retreat. Kelly-Kenny's Division (6th) had orders to follow and support this movement. Meanwhile Tucker was to push straight along the southern bank of the river, though we may surmise that his instructions were, in case of resistance, not to push his attack home. Colvile's 9th Division, with part of the naval brigade, were north of the river, the latter to shell the drifts in case the Boers tried to cross, and the infantry to execute a turning movement which would correspond with that of the cavalry on the other flank. The plan of action was based, however, upon one supposition which proved to be fallacious. It was that after having prepared so elaborate a position the enemy would stop at least a little time to defend it. Nothing of the sort occurred, however, and on the instant that they realised that the cavalry was on their flank they made off. The infantry did not fire a shot. The result of this very decisive flight was to derange all calculations entirely. The cavalry was not yet in its place when the Boer army streamed off between the kopjes. One would have thought, however, that they would have had a dash for the wagons and the guns, even if they were past them. It is unfair to criticise a movement until one is certain as to the positive orders which the leader may have received; but on the face of it it is clear that the sweep of our cavalry was not wide enough, and that they erred by edging to the left instead of to the right, so leaving the flying enemies always to the outside of them.