Meanwhile Cronje was not perturbed by the reports of troops coming up the Western line, and was confident that they only indicated a renewed but isolated attack on Magersfontein. He had no doubt that if necessary he could always fall back upon Kimberley and retreat towards the Transvaal; and the demonstrations made by Methuen westwards in the direction of Koedoesberg Drift served the double purpose of warning a disaffected region and of diverting Cronje's attention from the flank on which he was to be attacked and which he believed to be secure. The two months following the arrival of Lord Roberts in South Africa were the only brilliant period of a dreary war which lasted nearly three years, and will perhaps save it from being quoted in military history as the most sluggish campaign of recent times. In each of the two objects of strategy, namely to avoid fighting the enemy on ground of his own choosing, and to compel him to fight under unfavourable conditions, Lord Roberts was extraordinarily successful. There was a light touch, an ingenuity, in his swift and silent strategy which contrasted strongly with the heavy and dull methods which had hitherto controlled the action. While Buller was talking about his tedious railway across the veld, and Milner at Capetown was dismalling the situation and discouraging the advance, Lord Roberts had in effect entered the capital of the Free State and seemed to have completed half his task. The Boers were hypnotized and deceived not only by signs from which they drew wrong inferences, but also by bogus orders which it was arranged should come under their notice and which were simultaneously cancelled in cipher: and when too late they awoke from the bewilderment, they began to scuttle to and fro like rabbits in a warren. There is good reason to believe that if the strategic ability of Lord Roberts could have been united in one mind to the determination of Lord Kitchener the war would have been over in a year. On February 8 Lord Roberts arrived at Modder River, where he found bad news awaiting him. Buller had failed at Vaalkrantz, and the diamond men of Kimberley were threatening to capitulate. By February 13 30,000 combatants, some of whom in order to preserve the illusion had been kept in the centre until the last moment, were in readiness at various points between the Orange and the Modder. The immediate problem before Lord Roberts was the relief of Kimberley in combination with the cornering of Cronje. In the background was the Natal trouble. Buller was again helplessly wringing his hands and reaching round to find excuses for his misadventures. Lord Roberts wisely left him alone and went on with his own work. He saw what Buller refused to see, that the Tugela could be crossed at Magersfontein and Ladysmith relieved at a drift of the Modder River. [Illustration: Sketch map of the Riet and Modder Drifts.]