There could only be one direction for the advance, and that must be along the Pretoria to Pietersburg railroad. This is the only line of rails which leads to the north, and as it was known to be in working order (the Boers were running a bi-weekly service from Pietersburg to Warm Baths), it was hoped that a swift advance might seize it before any extensive damage could be done. With this object a small but very mobile force rapidly assembled at the end of March at Pienaar River, which was the British rail-head forty miles north of Pretoria and a hundred and thirty from Pietersburg. This column consisted of the Bushveld Carbineers, the 4th Imperial Bushmen's Corps, and the 6th New Zealand contingent. With them were the 18th battery R.F.A., and three pom-poms. A detachment of the invaluable mounted Sappers rode with the force, and two infantry regiments, the 2nd Gordons and the Northamptons, were detached to garrison the more vulnerable places upon the line of advance.

Upon March 29th the untiring Plumer, called off from the chase of De Wet, was loosed upon this fresh line, and broke swiftly away to the north. The complete success of his undertaking has obscured our estimate of its danger, but it was no light task to advance so great a distance into a bitterly hostile country with a fighting force of 2000 rifles. As an enterprise it was in many ways not unlike Mahon's dash on Mafeking, but without any friendly force with which to join hands at the end. However from the beginning all went well. On the 30th the force had reached Warm Baths, where a great isolated hotel already marks the site of what will be a rich and fashionable spa. On April 1st the Australian scouts rode into Nylstroom, fifty more miles upon their way. There had been sufficient sniping to enliven the journey, but nothing which could be called an action. Gleaning up prisoners and refugees as they went, with the railway engineers working like bees behind them, the force still swept unchecked upon its way. On April 5th Piet Potgietersrust was entered, another fifty-mile stage, and on the morning of the 8th the British vanguard rode into Pietersburg. Kitchener's judgment and Plumer's energy had met with their reward.

The Boer commando had evacuated the town and no serious opposition was made to the British entry. The most effective resistance came from a single schoolmaster, who, in a moment of irrational frenzy or of patriotic exaltation, shot down three of the invaders before he met his own death. Some rolling stock, one small gun, and something under a hundred prisoners were the trophies of the capture, but the Boer arsenal and the printing press were destroyed, and the Government sped off in a couple of Cape carts in search of some new capital. Pietersburg was principally valuable as a base from which a sweeping movement might be made from the north at the same moment as one from the south-east. A glance at the map will show that a force moving from this point in conjunction with another from Lydenburg might form the two crooked claws of a crab to enclose a great space of country, in which smaller columns might collect whatever was to be found. Without an instant of unnecessary delay the dispositions were made, and no fewer than eight columns slipped upon the chase. It will be best to continue to follow the movements of Plumer's force, and then to give some account of the little armies which were operating from the south, with the results of their enterprise.

It was known that Viljoen and a number of Boers were within the district which lies north of the line in the Middelburg district. An impenetrable bush-veld had offered them a shelter from which they made their constant sallies to wreck a train or to attack a post. This area was now to be systematically cleared up. The first thing was to stop the northern line of retreat. The Oliphant River forms a loop in that direction, and as it is a considerable stream, it would, if securely held, prevent any escape upon that side. With this object Plumer, on April 14th, the sixth day after his occupation of Pietersburg, struck east from that town and trekked over the veld, through the formidable Chunies Pass, and so to the north bank of the Oliphant, picking up thirty or forty Boer prisoners upon the way. His route lay through a fertile country dotted with native kraals. Having reached the river which marked the line which he was to hold, Plumer, upon April 17th, spread his force over many miles, so as to block the principal drifts. The flashes of his helio were answered by flash after flash from many points upon the southern horizon. What these other forces were, and whence they came, must now be made clear to the reader.

General Bindon Blood, a successful soldier, had confirmed in the Transvaal a reputation which he had won on the northern frontier of India. He and General Elliot were two of the late comers who had been spared from the great Eastern dependency to take the places of some of those Generals who had returned to England for a well-earned rest. He had distinguished himself by his systematic and effective guardianship of the Delagoa railway line, and he was now selected for the supreme control of the columns which were to advance from the south and sweep the Roos-Senekal district. There were seven of them, which were arranged as follows:

Two columns started from Middelburg under Beatson and Benson, which might be called the left wings of the movement. The object of Beatson's column was to hold the drifts of the Crocodile River, while Benson's was to seize the neighbouring hills called the Bothasberg. This it was hoped would pin the Boers from the west, while Kitchener from Lydenburg advanced from the east in three separate columns. Pulteney and Douglas would move up from Belfast in the centre, with Dulstoom for their objective. It was the familiar drag net of French, but facing north instead of south.

On April 13th the southern columns were started, but already the British preparations had alarmed the Boers, and Botha, with his main commandos, had slipped south across the line into that very district from which he had been so recently driven. Viljoen's commando still remained to the north, and the British troops, pouring in from every side, converged rapidly upon it. The success of the operations was considerable, though not complete. The Tantesberg, which had been the rallying-point of the Boers, was occupied, and Roos-Senekal, their latest capital, was taken, with their State papers and treasure. Viljoen, with a number of followers, slipped through between the columns, but the greater part of the burghers, dashing furiously about like a shoal of fish when they become conscious of the net, were taken by one or other of the columns. A hundred of the Boksburg commando surrendered en masse, fifty more were taken at Roos-Senekal; forty-one of the formidable Zarps with Schroeder, their leader, were captured in the north by the gallantry and wit of a young Australian officer named Reid; sixty more were hunted down by the indefatigable Vialls, leader of the Bushmen. From all parts of the district came the same story of captures and surrenders.

Knowing, however, that Botha and Viljoen had slipped through to the south of the railway line, Lord Kitchener determined to rapidly transfer the scene of the operations to that side. At the end of April, after a fortnight's work, during which this large district was cropped, but by no means shaved, the troops turned south again. The results of the operation had been eleven hundred prisoners, almost the same number as French had taken in the south-east, together with a broken Krupp, a pom-pom, and the remains of the big naval gun taken from us at Helvetia.

It was determined that Plumer's advance upon Pietersburg should not be a mere raid, but that steps should be taken to secure all that he had gained, and to hold the lines of communication. With this object the 2nd Gordon Highlanders and the 2nd Wiltshires were pushed up along the railroad, followed by Kitchener's Fighting Scouts. These troops garrisoned Pietersburg and took possession of Chunies Poort, and other strategic positions. They also furnished escorts for the convoys which supplied Plumer on the Oliphant River, and they carried out some spirited operations themselves in the neighbourhood of Pietersburg. Grenfell, who commanded the force, broke up several laagers, and captured a number of prisoners, operations in which he was much assisted by Colenbrander and his men. Finally the last of the great Creusot guns, the formidable Long Toms, was found mounted near Haenertsburg. It was the same piece which had in succession scourged Mafeking and Kimberley. The huge gun, driven to bay, showed its powers by opening an effective fire at ten thousand yards. The British galloped in upon it, the Boer riflemen were driven off, and the gun was blown up by its faithful gunners. So by suicide died the last of that iron brood, the four sinister brothers who had wrought much mischief in South Africa. They and their lesson will live in the history of modern artillery.

The sweeping of the Roos-Senekal district being over, Plumer left his post upon the River of the Elephants, a name which, like Rhenoster, Zeekoe, Kameelfontein, Leeuw Kop, Tigerfontein, Elands River, and so many more, serves as a memorial to the great mammals which once covered the land. On April 28th the force turned south, and on May 4th they had reached the railroad at Eerstefabrieken close to Pretoria. They had come in touch with a small Boer force upon the way, and the indefatigable Vialls hounded them for eighty miles, and tore away the tail of their convoy with thirty prisoners. The main force had left Pretoria on horseback on March 28th, and found themselves back once again upon foot on May 5th. They had something to show, however, for the loss of their horses, since they had covered a circular march of 400 miles, had captured some hundreds of the enemy, and had broken up their last organised capital. From first to last it was a most useful and well-managed expedition.