The troops of General Botha, weakened and disintegrated, still continued a species of opposition which was met by the persistent activity of the British commanders. The blockhouse system developed, enclosing vast areas which were first carefully swept by the British troops, and subsequently occupied by a network of Constabulary Posts. With the continued extension of the blockhouse lines, the strain of night duty, and the arduous labours of constructing fences, trenches, and ramparts, fell heavily on the lessening garrisons of individual blockhouses. Yet these overworked, fatigued troops never failed to respond with spirit and cheerfulness to every fresh call made upon them. General B. Hamilton, after the capture of General Erasmus, returned to Ermelo. Knowing that a Boer laager was located in his vicinity, he directed Colonel Wing to make a night raid upon Witbank, some twenty-two miles to north-west of him. Simultaneously Colonel Mackenzie arranged a descent on the same objective from the neighbourhood of Carolina--a co-operative movement which acted splendidly and resulted in the capture of 42 prisoners, including Major Wolmarans, Captain Wolmarans, and Lieutenant Malan (all of the Staats Artillery), together with ammunition and camp equipment. Not completely satisfied with the haul, and suspecting that the Boers, scattered for the nonce, would return to their old haunt, General Hamilton, with great wiliness, planned a second night raid in the same locality. His surmises proved correct. The stragglers had returned, but, luckily for them, their outlying pickets gave the alarm in time, and enabled them to escape in hot haste. They secured a fair start, and though a spirited chase after flying burghers was carried on for seven miles, some of them managed to get off. Others were ridden down, and 32 prisoners were secured. Mules, cattle, and vehicles swelled the bag. On the 18th General Hamilton made a third night expedition in deplorable weather and over atrocious ground, and captured 27 prisoners. And yet another dash (on the 24th) from Ermelo towards Boschmansfontein put him in possession of twelve more of the enemy. The greatest triumph was achieved on the 26th, Colonel Wools-Sampson and his Intelligence Staff being mainly instrumental in procuring the success of the affair. Picked men and horses were drawn from the columns under General Spens, Colonels Allenby, Mackenzie, and Stewart. These, in ignorance till the last moment of the nature of their mission, were suddenly directed on Tafel Kop (ten miles north-west of Ermelo). It was now found that the Boer tracks forked in two, and therefore the force divided. General B. Hamilton's party proceeded one way in the pouring rain, and sure enough found a huge laager at Nelspan. This they charged grandly, and in a few moments a swarm of Boers fled through the tempest, followed for miles by the troops with ardour little damped by the nature of the weather. The other way was