Meanwhile those who had marched across this Dere and gone on towards Suvla, swung round to the right to clear the Turks from Bauchop's Hill, which overlooks the Chailak Dere from the north. Bauchop's Hill (a rough country even for Gallipoli) is cleft by not less than twenty great gullies, most of them forked, precipitous, overgrown and heaped with rocks. The New Zealanders scrambled up it from the north, got into a maze of trenches, not strongly held, beat the Turks out of them, wandered south across the neck or ridge of the hill, discovering Turk trenches by their fire, and at last secured the whole hill. This success, besides securing the Chailak Dere from any assault from the north, secured the south flank of the Aghyl Dere beyond it. Meanwhile the Left Covering Column (mainly Welshmen) which for some time had halted at Old No. 3 Post, waiting for the sound of battle to tell them that the Turks on Bauchop's Hill were engaged, marched boldly on the Aghyl Dere, crossed it in a rush, taking every Turk trench in the way, then stormed the Turk outpost on Damakjelik Bair, going on from trench to trench in the dark guided by the flashes of the rifles, till the whole hill was theirs. This success opened up the Aghyl Dere to the attacking column. As the troops drew their breath in the still night on the little hill which they had won, they heard about three miles away a noise of battle on the seacoast to their left. This noise was not the nightly "hate" of the monitors and destroyers but an irregular and growing rifle fire. This, though they did not know it, was the beginning of the landing of the new Divisions, with their 30,000 men, at Suvla Bay. For the moment, Suvla was not the important point in the battle. The three Deres were the important points, for up the three Deres, now cleared of Turks, our Attacking Columns were advancing to the assault.