A second feature of the Boer army, and equally as important as the freedom of action of its individuals, was its mobility. Every burgher was mounted on a fleet horse or pony, and consequently his movements on the battlefield, whether in an advance or in a retreat, were many times more rapid that those of his enemy--an advantage which was of inestimable value both during an engagement and in the intervals between battles when it was necessary to secure new positions. During the progress of a battle the Boers were able to desert a certain point for a time, mount their horses and ride to another position, and throw their full strength against the latter, yet remaining in such close touch with the former that it was possible to return and defend it in an exceedingly short space of time. With the aid of their horses they could make such a sudden rush from one position to another that the infantry of the enemy could be surrounded and cut off from all communications with the body of its army almost before it was known that any Boers were in the vicinity, and it was due to that fact that the Boers were able to make so many large numbers of captives. The fighting along the Tugela furnished many magnificent examples of the Boers' extreme mobility. There it was a constant jump from one position to another--one attack here yesterday, another there to-day. It was an incessant movement made necessary by the display of energy by the British, whose thrice-larger forces kept the Boers in a state of continued ferment. On one side of the river, stretched out from the south of Spion Kop, in the west, to almost Helpmakaar, in the east, were thirty thousand British troops watching for a weak point where they might cross, and attacking whenever there seemed to be the slightest opportunity of breaking through; on the other side were between two and three thousand mounted Boers, jumping from one point to another in the long line of territory to be guarded, and repelling the attacks whenever they were made. The country was in their favour, it is true, but it was not so favourable that a handful of men could defend it against thousands, and it was partly due to the great ease and rapidity with which the Boers could move from one place to another, that Ladysmith remained besieged so long. The mobility of the Boers was again well demonstrated by the retreat of the burghers from the environs of Ladysmith. After the Krijgsraad decided to withdraw the forces into the Biggarsberg, it required only a few hours for all the many commandos to leave the positions they had held so long; to load their impedimenta and to be well on the way to the northward. The departure was so rapid that it surprised even those who were in Ladysmith. One day the Boers were shelling the town as usual and all the commandos were observed in the same positions which they had occupied for several months; the following day not a single Boer was to be seen anywhere.