While this flanking process was taking place, Colonel Bethune, with his composite force of Mounted Infantry, was co-operating in the direction of Helpmakaar, thus threatening the Boers' left flank, and rendering their position at Helpmakaar distinctly uncomfortable. The guns on both sides worked furiously--those of the Boers with poor success; and at dusk, when the troops bivouacked, there was reason to hope that by morning the region of Helpmakaar would be purged of the enemy. And so it proved. With the dawn of day it was discovered that the Dutchmen were in full retreat towards Dundee, pursued by the cavalry. But the enemy were covered in their retreat by some 1500 Boers, whose tactics were excellent. Each section as it fell back set fire to the grass, thus drawing a veil of smoke between them and Dundonald's men, and intercepting the rush of the pursuers, who more than once were almost within a lance-length of them. They succeeded in getting clear away, in spite of the magnificent dash of the pursuit, which covered some forty miles. Then, having secured some kops, they made sufficient stand to check our advance through the rippling sea of flame made by the veldt fires, while their main body vanished, leaving open the road to Dundee. The Boers, finding themselves outflanked, decided to make no stand, either at Dundee or Glencoe, and both these places, of now historical interest, were occupied in the course of the 15th, and the 16th was spent in resting after the fatigues of the preceding days. Dundee was a sad and deserted-looking place. Though the coal-mines were untouched, its houses were denuded of furniture, and bore evidences of Boer occupation and Boer mischief. Wall papers hung in shreds, doors were unhinged and broken, windows were merely gaps, and the word dilapidation was marked everywhere. The inhabitants, such few as remained, gave the troops a cordial welcome. [Illustration: GENERAL BULLER'S ADVANCE TO NEWCASTLE.]