Meanwhile, Grimwood was being hard pressed on the low kopjes to the northward, and his line became thinner every moment as he endeavoured to meet the continual attempts upon his flanks. Two Boer guns shelled steadily the much exposed 8th brigade from various points, and when about 8 a.m. a pom-pom, joining in the bombardment, killed with its first discharges some of the ammunition mules and scattered the rest far and wide, Grimwood sent urgent messages to the artillery for support. Sir G. White was at that moment himself with the batteries, which were being enfiladed again, this time by some guns on the low ground below and south of Pepworth. He promptly despatched the 21st and 53rd batteries to positions from which, facing eastwards, they could support both the cavalry and Grimwood. The 21st moved far southward, and from a gap in the hills between the infantry and cavalry soon rendered for the left of the latter the same service as the 69th was performing for the right. The 53rd battery, coming into action near the Elandslaagte road, engaged the Boer guns on Grimwood's front, and though kept at extreme range by Sir G. White's orders, succeeded in much reducing their effect. At the same time the 13th battery also left the line facing Pepworth, and, wheeling eastward, shelled the hostile artillery on the left front of the infantry with good results. [Sidenote: 9 to 11 a.m. a stationary battle.] For two hours, from about 9 a.m. to 11 a.m., the engagement continued with little movement of either army. The Boers, being now within 800 yards of the British, could advance no further, but sent a steady stream of bullets against the ridges, pinning the cavalry to Lombards Kop and the infantry to their line of hillocks along the Modder. By 9.30 a.m. Grimwood's last available reserve was put into the firing line, and he could prolong his front no more, though the enemy still threatened his flanks. The artillery was strangely dispersed. Far on the right the 69th battery stood in action upon Umbulwana Nek; the 21st battery on the northern side of Lombards Kop covered French's left and Grimwood's right; out in the open to their left rear the 53rd battery shot above the heads of the right wing of the infantry, whilst farther northward the 13th sent shrapnel over the left wing. Only the 42nd and 67th batteries remained on the site first held by the artillery facing north-west, where the former suffered considerable losses from the heavy enfilade and frontal fire which recommenced. For the Boer artillerymen, encouraged by the diminution of the British gun-power at this point, had not only returned to the pieces upon Pepworth, but placed fresh ones upon the northernmost spurs of Long Hill itself. [Sidenote: Reserve absorbed by action.]