On Wednesday, the 10th, the British force started westward. No telegram as yet gives its distribution, but it is plain that Clery's and Warren's divisions moved out, together with the cavalry brigade and whatever mounted infantry had not been sent south. Hart's and Barton's brigades, or one of them, with a proportion of artillery may be assumed to have been left in the entrenchments which face Colenso and cover the British line of communications by the railway. On Thursday morning Lord Dundonald with the cavalry brigade and some of the mounted infantry was in possession of the hills overlooking Potgieter's Drift and of the pont or ferry-boat. The same day the infantry or the leading division, Clery's, was in the hills north of Springfield. Lord Dundonald's force commanded the river at Potgieter's Drift, and the crossing there was thus assured. A pause of four days followed: a pause probably not of inaction, but of strenuous preparation in order to make the final advance vigorous. During those days, no doubt, supplies would be accumulated at Springfield Bridge Camp, at Spearman's Farm, and at some point near to the next drift to the west. This would save delays when the advance began, for if the force depended upon magazines at Frere the transport would break down in the advance beyond the Tugela, whereas if the transport had in the later stages merely to start from the south side of the Tugela, the force could be kept supplied for a few days. Lord Dundonald was engaged in strengthening his position at Zwart's Kop, so that in any case there would be a secure retreat across the river if need be. The river itself seems also to have been properly reconnoitred.