The harried Boers moved a hundred miles north to Rustenburg, followed by Methuen, Fetherstonhaugh, Hamilton, Kekewich, and Allenby, who found the commandos of De la Rey and Kemp to be scattering in front of them and hiding in the kloofs and dongas, whence in the early days of September no less than two hundred were extracted.
On September 6th and 8th Methuen engaged the main body of De la Rey in the valley of the Great Marico River which lies to the north-west of Rustenburg.

In these two actions he pushed the Boers in front of him with a loss of eighteen killed and forty-one prisoners, but the fighting was severe, and fifteen of his men were killed and thirty wounded before the position had been carried.

The losses were almost entirely among the newly raised Yeomanry, who had already shown on several occasions that, having shed their weaker members and had some experience of the field, they were now worthy to take their place beside their veteran comrades.
The only other important operation undertaken by the British columns in the Transvaal during this period was in the north, where Beyers and his men were still harried by Grenfell, Colenbrander, and Wilson.

A considerable proportion of the prisoners which figured in the weekly lists came from this quarter.

On May 30th there was a notable action, the truth of which was much debated but finally established, in which Kitchener's Scouts under Wilson surprised and defeated a Boer force under Pretorius, killing and wounding several, and taking forty prisoners.