Note Back to Main Text — Chapter XV

When the Boers, after their defeat on the 25th November, retreated from the heights of Graspan,[168] the greater part of their force withdrew to Jacobsdal, little inclined to renew the combat. But General De la Rey induced the burghers to make another effort to arrest the British march on Kimberley, at a position of his own selection at the confluence of the Riet and the Modder rivers, where the terrain differed in character from that which had been occupied at Belmont and Graspan. In those engagements the Boers had entrenched themselves upon high and rugged kopjes, of which the apparent strength became a source of weakness. The hills afforded an excellent target for the British artillery. The riflemen who held the works had to aim downwards at the enemy as he advanced to the attack, and a "plunging" fire never yields satisfactory results. At their base was dead ground, inaccessible to the musketry of the defenders. Here the attacking infantry, after their rush across the open, could halt for breathing space before delivering the final assault. For these reasons De la Rey The ground chosen by De la Rey. Nov. 26th. decided to adopt completely new tactics and to fight from the bed of a river, surrounded on every side by a level plain, destitute of cover over the surface of which the burghers could pour a continuous and "grazing" fire upon the British from the time they first came within range, up to the very moment of their final charge. The plain, across which the railway from Orange River to Kimberley runs nearly due north and south, is intersected by the devious windings of two rivers, the Riet and the Modder. From Bosman's Drift (see map 12) the Riet, the more southerly of the two, runs north-west for about a mile and a half, and then for the same distance turns to the north-east. Its course next changes abruptly to the north-west for nearly two miles when, increased in volume by the waters of its affluent, the Modder, it gently curves to the westward for about a mile and a half. The meanderings of the Modder are even more remarkable. Its most southern elbow is half a mile north-east of the spot where the Riet turns for the second time north-west. Thence it runs for a mile to the north, then about the same distance to the west; it turns southward for a mile, and then flows westward for three-quarters of a mile, where, a few hundred yards above the railway bridge, it merges into the Riet. Both these streams have cut themselves channels so wide as to allow a thick growth of trees and scrub to line their sides, so deep that the vegetation which they contain hardly shows above the level of the surrounding plain. There are few practicable fords across the Riet. One exists at Bosman's Drift; there is a second near the railway bridge; among the group of islets at Rosmead there is a natural ford, while the retaining wall of the weir which dams the river at this village can be used, not without difficulty, by active men in single file. Elsewhere the depth of the water and the mud at the bottom of the Riet effectually combine to prevent the passage of troops. Thus the Riet and the Modder together formed not only a gigantic moat across the approaches to Kimberley from the south and south-east, but a covered way, by which its defenders could move unseen to any part of the position.