It may well be doubted whether the price paid for the relief of the diamond men was not too high. Uninstructed public opinion at home called for the movement, and forced Lord Roberts' hand, but it was never an imperative military necessity. The horse casualties,[35] due to want of water, forced marches, and ignorance of horsemastership on the part of all ranks, who were inclined to regard cavalry work in the light of a steeplechase, were so heavy that when on February 17 French, after an attempt on the previous day to pursue a body of retreating Boers with his exhausted horses, was suddenly called upon to march thirty miles to head off Cronje, he could in all his Division mount less than the strength of two regiments. Nor was this all, for the rush to Kimberley was the indirect cause of the loss of the supply column at Waterval Drift on February 15; and thus in a few hours the mounted force and the supply column and transport which Lord Roberts and his staff had assembled with so much difficulty were, the former partially and the latter entirely, sacrificed. The VIth, VIIth, and IXth Infantry Divisions, under Kelly-Kenny, Tucker, and Colvile respectively, were withdrawn from Modder River and the stations south of it, and concentrated at Ramdam on February 11 and the two following days. Owing to the steepness of its banks the Riet River could only be crossed at Waterval and De Kiel's Drifts, and on these the Army converged, and trickled through them like the sands in the neck of an hour-glass. Men, horses, guns, supply and ammunition wagons were slowly and painfully transferred to the right bank, and the VIth Division, which followed the cavalry to De Kiel's Drift, though the first infantry to get through by more than twenty-four hours, was delayed by the block of transport and lost its start in the race to the Modder River. Meanwhile to Waterval Drift came Kelly-Kenny and Colvile in succession, and were soon pushed on to Wegdraai Drift, to which Tucker also hastened as soon as he could shake himself clear of De Kiel's Drift. The latter was now out of the running, for although Kelly-Kenny had already had a nine hours' march from Waterval Drift beginning soon after midnight, by 5 in the afternoon of February 14 the VIth Division was ready to resume its march to support French at Klip Drift, some hours before Tucker came in. Kitchener had been ordered by Lord Roberts to attach himself to the VIth Division as assessor to Kelly-Kenny, and marched out with it.