On Jan. 14th, a flying column[273] under Major E. H. H. Allenby (Inniskilling), marched northward along the Seacow river. Turning to the east, he demonstrated against the enemy's communications at the Colesberg road bridge, at which about twenty shells were fired at 5,000 yards' range. The Boers thereupon appeared in three bodies in greatly superior numbers, and Allenby, having taken five prisoners, fell back, easily avoiding an attempt to cut him off. This reconnaissance had the effect of causing the enemy to cease to use the wagon road for transport purposes. Jan. 15th. Boers attack Slingersfontein. Next day (15th) the Boers retaliated by a determined attack on the isolated post at Slingersfontein, held on that day by a half company 1st Yorkshire regiment,[274] commanded by Captain M. H. Orr and a company (58 men) New Zealand Mounted Rifles under Captain W. R. N. Madocks, R.A. (attached). These had their trenches above the farm, the New Zealanders upon the eastern and the Yorkshire upon the western sides of a steep and high hill, the lower slopes of which were largely dead ground to those in the defences. Other kopjes, accessible to the Boers, were within rifle range. The position was thus to the Boer rifleman an ideal one for the most exceptional of his fighting practices, the close offensive. In the subsequent attack, every detail was typical of his methods on such occasions. At 6.30 a.m. a long-range sniping fire began to tease the occupants of the hill. They vainly searched amongst the broken kopjes for sight of an enemy. Growing, certainly, but almost imperceptibly, in volume and accuracy, this fire was directed chiefly at the New Zealanders on the east, and by 10 a.m. had become so intense that an attack in that direction seemed imminent. Meanwhile, a body of the enemy had been crawling from exactly the opposite quarter towards the western side, upon which they succeeded in effecting a lodgment unseen. They then began to climb, scattering under cover of the boulders. Not until they were close in front of the sangars of the Yorkshire regiment was their presence discovered by a patrol which Madocks had sent from his side of the hill. Thereupon the Boers opened a hot fire, striking down both the officer and the colour-sergeant of the Yorkshire, whose men, taken by surprise and suddenly deprived of their leaders, fell into some confusion. The Boers then occupied the two foremost sangars. The hill seemed lost. Then Madocks, hearing the outburst on the further side from him, took a few of his men and hurried round to assist, appearing amongst the Yorkshire just as the enemy were all but into them. Rallying the soldiers, and perceiving the Boers a few yards away behind the rocks, he immediately ordered a charge, and followed by a few, cleared the enemy out of the nearer of the two abandoned sangars. The Boers continued to shoot rapidly from the wall beyond, and Madocks, a few moments later, charged again. Accompanied this time by but three men, he closed to within a few feet of the more distant sangar. Two of the men with him were here killed, and Madocks, seeing the uselessness of remaining, made his way back again to the sangar in rear with his sole companion, called together the rest of the Yorkshire detachment, and began hurriedly to strengthen the wall under a searching fire. At this moment a party of his own New Zealanders, for whom he had sent back, doubled up to the spot, and led by himself, whilst a storm of bullets broke over them from the surrounding kopjes, charged down on the Boers with fixed bayonets. The Boers are repulsed. The enemy fled at once, rising from behind the stones upon the hillside. Pursued by volleys from the crest of the British position, they made their way back to their lines, leaving twenty-one dead upon the field.[275]

Arrival, Jan. 15th, of Clements, and fresh troops then and later to Jan. 21st, causes changes in dispositions.

Whilst this affair was in progress, a welcome reinforcement arrived. Major-General R. A. P. Clements brought with him the 1st Royal Irish and the remainder of the 2nd Worcestershire of his brigade (12th), in all an addition of 18 officers and 874 men. Clements was immediately placed in command of the Slingersfontein area.[276] This increase of strength enabled French to extend his right still further by moving Porter's command[277] south-eastward to Potfontein farm, and that of Rimington,[278] hitherto stationed at Jasfontein farm, to Kleinfontein farm, five miles north of Porter. For a time Rimington was able to station some Household cavalry in close touch with the enemy at Rhenoster farm, on the Bethulie road, but it was thought prudent to withdraw them on January 21st, as a commando of 1,000 men had gathered opposite the post. A demonstration by Porter towards Hebron farm on the 19th disclosed, about Keerom, south of Achtertang, a large Boer laager, which was shelled with effect. A deserter reported the enemy in this direction to consist of 6,000 men. During the next two days the following reinforcements reached the camp:—2nd Bedfordshire regiment, 2nd Wiltshire regiment, detachments of the 1st Essex and 1st Yorkshire regiments and details of Royal engineers and Army Service Corps, a total accession of about 50 officers and 1,900 men. Two howitzers,[279] which had come up on the 18th, shelled Grassy Hill on the 19th and following days with effect, their fire being directed by telegraph from Coles Kop.

Jan. 24th. French seizes Bastard's Nek.

Recognising that he was blocked to the eastward by the superior and apparently constantly increasing commandos, French now turned once more to the westward for a chance of gaining commanding positions, such as alone could enable him to manœuvre the enemy from Colesberg. An opening seemed to offer, because of the reported partial or entire abandonment of the important defile known as Plessis Poort, through which ran the road from Colesberg northward to the bridge and Botha's Drift. The possession of this pass would not only cut the Boers' line of retreat and northerly communications, but would seriously imperil those leading to Norval's Pont; for high ground, running south-eastward from the Poort, in parts parallel to the road and railway, in parts impinging on them, practically commanded both for a distance of some twenty miles from Colesberg. French, therefore, determined to lose no time in reconnoitring and, if possible, seizing on so valuable a point, and on the evening of January 24th, despatched de Lisle to occupy Bastard's Nek, a defile cutting the same range as Plessis Poort, and five miles to the westward of it. This being safely effected, early on the 25th a strong column[280] concentrated at the Nek. French's plan was as follows:—

Jan. 25th. He strikes at Plessis Poort.

Whilst the infantry, covered by a cross fire of artillery, pushed along the high ground towards Plessis Poort, the cavalry, diverging north-eastward, were to turn the Poort by the Boer right, and at the same time watch for any counter attack from the direction of the road bridge. To draw attention from these movements, demonstrations were to be made from every part of the British lines about Colesberg. As soon as it was light these operations began. Whilst McCracken, under cover of the howitzers and the two guns on Coles Kop, advanced from Kloof camp, whilst Clements, pushing out from Porter's Hill and Slingersfontein, shelled once more the laager at Keerom, and Porter from Kleinfontein, made as if to fall upon the railway towards Van Zyl siding, Brabazon's mounted force drew out to the northward, and Stephenson sent the infantry, the Essex leading, along the ridge towards the Poort. By 10 a.m. the four R.H.A. guns were in action against the Poort at a point 2,400 yards north-west of it. Brabazon's cavalry started late, owing to a delay on the part of the battalion told off to relieve the intermediate posts: the enemy, getting wind of his presence, advanced from the north with two guns, and from the east, and so delayed him that his turning movement was completed too late in the day to be utilised. Meanwhile the infantry, covered by the fire of the 4th battery, worked rapidly towards the Pass, driving scattered parties before them, and by 2 p.m. had reached favourable ground within 1,500 yards of it. Here Stephenson deployed the 2nd Wiltshire regiment, and sent it forward with orders to establish itself within 800 yards of the enemy, unless heavily fired upon whilst advancing. This the Wiltshire, moving in six lines 100 yards apart, did without loss, under a fire so trifling that the enemy seemed to be falling back, and Stephenson sent word to the General requesting permission to push the attack home. French avoids a trap, and returns to camp. But French, who knew his opponents, had grown suspicious because of their silence. The hour was late, the cavalry turning movement had not been carried out, and finally instructions from the Commander-in-Chief had enjoined him to avoid serious fighting.[281] At 4 p.m., therefore, he gave the order to retire, and the Wiltshire firing lines rose to obey. Scarcely had they done so, before a burst of fire, both of rifles and guns, from the enemy's ridges, showed the nature of the trap that had been prepared. But in spite of the heavy fusilade which followed them back, the Wiltshire, retiring as steadily as they had advanced, rejoined the column with a loss of but ten men wounded. The whole force then returned to its bivouacs.

French, Jan. 29th, is summoned to Cape Town.

This reconnaissance, though it failed to give General French the Poort, succeeded in disclosing to him the nature of the enemy's dispositions in this neighbourhood, especially of those behind the hitherto impenetrable Grassy Hill. Such knowledge might have gone far towards a solution of the problem which had so long engaged his energies, the ousting of the Boers from their stronghold on British territory. The more vital portion of his task, the prevention of a further inroad into the colony, he had already performed. He was now to be called away to a wider field. On January 29th he went down to Cape Town to receive instructions from the Commander-in-Chief. He returned to Rensburg on the 31st to break up his command. On February 6th he finally left Rensburg, after issuing an order in which he paid full tribute to the courage and energy of staff and troops, who had so long held in check "an enemy whose adroit skill in war demands the most untiring vigilance."[282] With French went all the Regular cavalry, except two squadrons, and also the 1st Essex and 1st Yorkshire regiments, the half-battalion 1st Welsh regiment, and O. and R. batteries, R.H.A. Major-General Clements was left at Rensburg with the remainder.[283]