Shortly before 4 a.m. Major-General J. M. Babington led the 12th Lancers, with G. battery and the greater part of the mounted infantry, to the eastward, hoping to turn the enemy's left flank. In a few minutes the sudden roar from the trenches warned him that fighting had begun, and soon afterwards his patrols were shot at from the low ridge which stretches from Magersfontein Hill to the Modder. He accordingly ordered G. battery to shell this ridge from the ground shown on the map, No. 13. In twenty minutes, the defenders had been at least temporarily silenced. About the time that G. battery opened Major-General Babington sent the 9th Lancers also eastwards, with instructions to force their way along the river to Brown's Drift and thus turn the enemy's left. Very early in the morning they reached Moss Drift, but their repeated efforts to advance further up the Modder were beaten back by musketry. While G. battery was employed against the low ridge, it became evident to Major-General Babington that the Highlanders not only had failed to carry the Magersfontein heights, but that they required instant reinforcement. He accordingly desired Major R. Bannatine-Allason, the battery commander, to move north-east over the scrubby ground, and not to come into action until he was stopped by the bullets or could get a clear view of what was going on at the front. The battery, with an escort of 12th Lancers and mounted infantry, advanced at a trot, and its commander, having obtained information from scattered Highlanders, pushed on towards the low knoll called on the map Horse Artillery Hill, the name by which it became known during the battle. Whilst the wire fence[205] which ran sixty or seventy yards to the south of Horse Artillery Hill was being cut to clear the way the battery came under infantry fire.[206] The commander, on reconnoitring the knoll in preparation for the battery, decided to run the guns up by hand and place them on the reverse slope.[207] Having taken up this situation he was able to continue in action there for twenty-four hours with the loss of only four men. The selected spot was 2,200 yards from the Boer trenches at the foot of Magersfontein Hill, and 1,400 yards from the low ridge, which was a few feet higher than Horse Artillery Hill. In consequence of the position being on the reverse slope there was, between the hill on which the guns were, and the low ridge, "dead ground." That is to say, that no shells from the battery could reach the space which lay nearest in the valley below. Therefore, on the one hand, this could be safely occupied by protecting troops, and on the other, unless some were there, the Boers could almost without risk have assailed the battery and perhaps have carried it by surprise. Before Major Allason's arrival there were on this dead ground many of the Highland brigade. Very soon after G. battery opened fire these men were reinforced by part of two dismounted squadrons of the 12th Lancers