It was then, after they had rallied again, that General De Wet, on the eve of the 28th of March, left Brandfort with a commando 1500 strong and moved in the direction of Winburg. De Wet had made up his mind to surprise the English garrison which guarded the Bloemfontein Waterworks at Sanna's Post, and so cut off the water supply of Bloemfontein.
With that object in view he made his movements thither by night, so as to keep the enemy in the dark as to his plans. Neither were these disclosed to the burghers, who were naturally anxious to know where they were going and what they were to do next.
On his way De Wet learnt that General Broadwood, dreading an attack of Commandant Olivier, had quitted Ladybrand and was marching on Bloemfontein with a strong force. This information was rather disconcerting, for now he had not only to reckon with the garrison, but to be ready for an engagement with a column 2000 strong, which might come to the relief of the garrison at any moment. In case of such an emergency, De Wet divided his forces into two parts. He placed one division—1050 strong with four guns—under the control of Generals Cronje, Froneman, Wessels, and Piet De Wet, with instructions to occupy the positions east of the Modder River and directly opposite the Waterworks, so as to check Broadwood, should he come to the rescue of the garrison.
Taking the remaining 350 burghers he set out to Koorn Spruit, a brook which flows into the Modder River. Arrived there, he carefully concealed his horses and men at a point where the road from the Waterworks to Bloemfontein passes through the brook. The other generals were to shell the garrison at daybreak, while he would fall on the troops if they tried to escape to Bloemfontein viâ Koorn Spruit.
As the Boer forces were getting into their different positions during the night, Broadwood, who had left Thaba 'Nchu at nightfall, arrived that very night at Sanna's Post. But we were each unconscious of the other's presence.
The next morning at daybreak we saw a waggon and a large number of cattle and sheep not far off the brook. The Kaffir drivers informed us that the British column had just arrived at Sanna's Post. As soon as we could see some distance ahead, we observed the enemy now hardly 3000 paces off. A few minutes later our guns began to play upon the unsuspecting British forces. What a scene of confusion! Broadwood had fallen into a trap and was between two fires. The whole column, with guns, waggons and carts, made hurriedly for the drift where De Wet and his men lay hidden. Nearer they came. At length a cart entered the drift. The occupants, husband and wife, looked bewildered on seeing armed Boers all around them in the bed of the brook. De Wet immediately ordered two of his adjutants to mount the cart and drive on. Then in quick succession followed a number of carts and vehicles, all driven by Englishmen from Thaba 'Nchu. These were ordered to proceed ahead and warned not to make any signals to the enemy. So well was everything arranged, that the first batch of troops that entered the drift had not the slightest suspicion that there was something wrong. Absolutely abashed were they on finding themselves among us; the men raised their hands in surrender at the cry of "Hands up!"
In this way we disarmed 200 without wasting a bullet. But this was not to go on for long; there came an officer from the rear who was determined to upset our plans and disturb our peace seriously. He, at least, was not going to surrender in this fashion. On being asked for his rifle he said, with marked resoluteness, "Be d——d! I won't," and called on his men to fire. He drew his sword, but before he could use it he was no more among the living.
The battle had begun. Scarcely 100 paces from the banks of the brook stood five of the enemy's guns and more than 100 waggons. Some 400 paces from these two more guns had stopped. The enemy had withdrawn for cover about 1300 yards to the station on the Dewetsdorp-Bloemfontein railway.
