The ground to the east of the Trou Bricot was less difficult. Open and comparatively flat, it was defended on the north of Perthes by a triple line of trenches distant 100 metres from each other. At a distance of 1000 metres to 1200 metres a supporting trench, called the "York trench," was almost unique in its entire construction. The open country beyond stretched for a distance of three kilometres up to the second German position (Hill 195, Butte de Tahure). The principal effort was directed against this passage, the left flank of the attack being secured by a subsidiary action confined to the capture of la Poche. [Sidenote: Attack preceded by artillery fire.] At 9 a.m. our artillery directed its fire successively against the first-line trenches and the supporting trenches. The attack took place in the most perfect order. The assailants were already swarming in the German lines when the enemy artillery opened its defensive fire. Our counter-batteries hampered the German pieces and our reserves in the rear suffered little from their fire. [Sidenote: La Poche position surrendered.] [Sidenote: The York trench occupied.] At 9.45 a.m. the two columns which were attacking the extremities of the salient of la Poche joined hands. The position was surrounded. These Germans who remained alive inside it surrendered. At the same time a battalion was setting foot in the defences of the southern edges of the wood of Trou Bricot. The battalions that followed, marching to the outside of the eastern edges, executed with perfect regularity a "left turn" and came and formed up alongside the alleys of communication as far as the supporting trench. At the same moment, in the open country to the north of Perthes, the troops surmounted the three first-line trenches and, preceded by our artillery, made a quick march towards the York trench and occupied it almost without striking a blow. [Sidenote: Cleaning up the sector.] Further to the East, along the road from Perthes to Tahure, their advance encountered greater difficulties. Some centres of the German resistance could not be overcome. A sheltered machine gun continued its fire. An infantry officer, with a quartermaster of artillery, succeeded in getting into action a gun at a distance of three hundred metres from the machine gun and in firing at it at close quarters. Of the troops which were advancing to the north of Perthes, some made for the eastern border of the wood of Bricot, where they penetrated into the camps, ousting the defenders and surprising several officers in bed. Late in the afternoon one of our regiments had reached the road from Souain to Tahure. Other units were marching straight towards the north, clearing out the little woods on the way. They there captured batteries of which the artillerymen were riveted to their guns by means of bayonets (notably ten pieces of 105 and five of 150). [Sidenote: Progress hindered by weather.]