There was much to be admired in the Boer defensive; up to a certain point it was stubborn and dangerous. The musketry from a position, poured upon zones of ground over which the British troops must pass rather than upon the troops themselves, was heavy and effective, and not easily quelled by bombardment. In battle, artillery may do its work without causing a casualty; but so long as he had cover for his body, the soul of the Boer rifleman was little shaken by the bursting of projectiles; fierce firing came often from portions of a position which appeared to be smothered by shrapnel, and invisible in the reek of exploding lyddite. [Sidenote: Special habits of fighting.] Nor did the Boer armies, as regular armies have done, cling to strong positions simply because they were strong. They considered a position as a means to an end, and if it ceased to be the best, they discarded it without hesitation, no matter with what toil it had been prepared. Nevertheless, on ground of their own choosing, the abandonment without a shot of strong, laboriously entrenched, positions by no means always meant retirement. Much as they dreaded being enveloped, their flanks, or what would have been the flanks of an European army, might be threatened again and again only to be converted each time into new and formidable fronts. The nature of the country, and the comparative mobility of the opposing forces rendered these rapid changes of front easy of execution, but they demanded promptness, and a genius for the appreciation of the value of ground, not only on the part of the Boer leaders, but also on that of the rank and file. In the ranks of the commandos persuasion had to take the place of word of command; the Boer soldier, before he quitted one position for another, had to be convinced of the necessity for a repetition of the severe toil of entrenching which had apparently been wasted. But his eye was as quick, his tactical and topographical instinct as keen as those of his commander, and if the new dispositions were not selected for him, he often selected them himself. [Sidenote: Their defences: strong points.]