The Boer surrounded the garrison during the night while the latter were occupied singing around their campfires, In response, the defenders' screw gun returned fire, destroying a farmhouse from which Boers were firing; however, the gun soon jammed. Unanswered, the Boer barrage of around 1,700 shells devastated the oxen and killed around 1,500 horses, mules and cattle. Those that remained alive were set free to avoid a stampede. ordered his men to cease fire and sent a messenger calling upon the garrison to surrender. After the garrison rejected the offer, the shelling resumed and continued throughout the night. After the initial heavy barrage, on the third day of the siege the Boer gunners eased their rate of fire when it became apparent that they were destroying some of the supplies they were trying to capture. Nevertheless, the Boers maintained small arms fire, keeping defenders trapped in their defences during the intense heat of the day; the heat also accelerated the decomposition of the dead animals, the smell of which was considerable. and Hore is reputed to have stated: "I cannot surrender. I am in command of Australians who would cut my throat if I did." As the fighting continued, the British made a second attempt to relieve the garrison, dispatching a force of about 1,000 men under Colonel
Robert Baden-Powell from Rustenburg on 6 August. He halted just from Rustenburg, around the
Selous River, about a third of the way, and sent out scouts. Failing to allow a proper reconnaissance, around midday Baden-Powell messaged General
Ian Hamilton and turned back, determining the relief effort pointless, citing previous instructions and warnings from
Commander-in-Chief of British Forces in South Africa Lord Roberts about becoming isolated, who were in revolt against the Boers following a series of tenant disputes. The ammunition situation was also concerning de la Rey and, as it became clear that the garrison would continue to hold out, he withdrew his artillery before superior numbers of British troops arrived. Ultimately, only about 200 men from the Wolmaransstad commando remained. As a result, the Boer weight of fire decreased and finally ceased altogether. In response, the defenders sent patrols out to scout the Boer positions and small raiding parties were also sent out at night. These raids failed to confirm that the Boers were retreating and as a result, instead of seizing the initiative the defenders remained largely in their defences, thinking that the Boers were attempting a ruse to draw them out. On 13 August, the British commanders learned that the garrison was still holding out when they intercepted a message between Boer commanders via a runner. Two days later, 10,000 men under the command of
Lord Kitchener, set out towards Elands River. As they approached, de la Rey, faced by a superior force, withdrew what remained of his force. Small arms fire around the perimeter ceased on 15 August and the garrison observed rising dust from the withdrawal. That evening, a message was sent to Hore by four Western Australians from a force under
Beauvoir de Lisle, and Kitchener's column arrived the following day, on 16 August. Carrington's relief force from Mafeking, having been ordered to make a second attempt by Roberts, backtracked very slowly and ultimately arrived after the siege had been lifted. ==Aftermath==