The 113th Brigade of the Welsh Division on the left had been passed over by the Albert bridges, and the 53rd had also passed in the night. The plan of August 23 was that these two brigades should attack Usna and Tara Hills respectively, on the high ground to the west of Becourt Wood. The Usna attack is described under the operations of the Fifth Corps. The Tara attack was completely successful, and four tanks rendered conspicuous service. The work was carried out by the 10th Essex, 7th West Kents, and the 7th Queen's from the 55th Brigade. It was a fine military feat, far more important than 350 prisoners would imply, for it broke the girdle round Albert and cleared the road for the advance. No progress was made at the other portions of the corps front on this date, save for some advance on the left of the Twelfth Division near Meaulte. [Sidenote: August 24.] It had been determined to keep up incessant pressure, and to test Hindenburg's incautious maxim that the side with the best nerves would wear down the other. At 1 A.M. on August 24 the whole line {49} burst into flame once more, and under a clear moon the Army rolled forward. On the right the Forty-seventh Division had ample revenge for its temporary check, as its 140th, together with the 175th Brigade of the Fifty-eighth Division, Londoners all, swept across the debated land of the Happy Valley and secured it. The Eighteenth Division also made good its objectives, the chief impediment being the historical mine craters of 1916 at La Boiselle; 250 prisoners were taken out of these by the 8th Royal Berks, a party of whom under Captain Nicholson, covered by Captain Sutherst's 53rd Trench Mortar Battery, cleared up this difficult point. In the morning the Eighteenth Division was well to the east of Becourt. The only check was in the centre, where the general advance of the Twelfth Division was still held up by that Pear Tree strong point which had already caused so much trouble. Before evening, however, it was clear that the enemy was effecting a general retreat, and the 37th Brigade was able to take possession of this very well defended portion of the ridge. [Sidenote: August 25.]