On the first day the movement upon Buller's part consisted in a very deliberate reconnaissance of and closing in upon the enemy's position, his troops bivouacking upon the ground which they had won. On the second, finding that all further progress was barred by the strong ridge of Bergendal, he prepared his attack carefully with artillery and then let loose his infantry upon it. It was a gallant feat of arms upon either side. The Boer position was held by a detachment of the Johannesburg Police, who may have been bullies in peace, but were certainly heroes in war. The fire of sixty guns was concentrated for a couple of hours upon a position only a few hundred yards in diameter. In this infernal fire, which left the rocks yellow with lyddite, the survivors still waited grimly for the advance of the infantry. No finer defence was made in the war. The attack was carried out across an open glacis by the 2nd Rifle Brigade and by the Inniskilling Fusiliers, the men of Pieter's Hill. Through a deadly fire the gallant infantry swept over the position, though Metcalfe, the brave colonel of the Rifles, with eight other officers, and seventy men were killed or wounded. Lysley, Steward, and Campbell were all killed in leading their companies, but they could not have met their deaths upon an occasion more honourable to their battalion. Great credit must also be given to A and B companies of the Inniskilling Fusiliers, who were actually the first over the Boer position. The cessation of the artillery fire was admirably timed. It was sustained up to the last possible instant. 'As it was,' said the captain of the leading company, 'a 94-pound shell burst about thirty yards in front of the right of our lot. The smell of the lyddite was awful.' A pom-pom and twenty prisoners, including the commander of the police, were the trophies of the day. An outwork of the Boer position had been carried, and the rumour of defeat and disaster had already spread through their ranks. Braver men than the burghers have never lived, but they had reached the limits of human endurance, and a long experience of defeat in the field had weakened their nerve and lessened their morale. They were no longer men of the same fibre as those who had crept up to the trenches of Spion Kop, or faced the lean warriors of Ladysmith on that grim January morning at Caesar's Camp. Dutch tenacity would not allow them to surrender, and yet they realised how hopeless was the fight in which they were engaged. Nearly fifteen thousand of their best men were prisoners, ten thousand at the least had returned to their farms and taken the oath. Another ten had been killed, wounded, or incapacitated. Most of the European mercenaries had left; they held only the ultimate corner of their own country, they had lost their grip upon the railway line, and their supply of stores and of ammunition was dwindling. To such a pass had eleven months of war reduced that formidable army who had so confidently advanced to the conquest of South Africa.
While Buller had established himself firmly upon the left of the Boer position, Pole-Carew had moved forward to the north of the railway line, and French had advanced as far as Swart Kopjes upon the Boer right. These operations on August 26th and 27th were met with some resistance, and entailed a loss of forty or fifty killed and wounded; but it soon became evident that the punishment which they had received at Bergendal had taken the fight out of the Boers, and that this formidable position was to be abandoned as the others had been. On the 28th the burghers were retreating, and Machadodorp, where Kruger had sat so long in his railway carriage, protesting that he would eventually move west and not east, was occupied by Buller. French, moving on a more northerly route, entered Watervalonder with his cavalry upon the same date, driving a small Boer force before him. Amid rain and mist the British columns were pushing rapidly forwards, but still the burghers held together, and still their artillery was uncaptured.